Positioning structure for clamping elliptical special-shaped part

Abstract

The positioning structure comprises a base, a lower pressing ring and an upper pressing ring, the lower pressing ring is arranged on the base and used for supporting a turned edge of the special-shaped part, the upper pressing ring is arranged on the lower pressing ring and used for pressing the turned edge of the special-shaped part, and a plurality of extrusion mechanisms used for extruding workpieces are evenly arranged on the inner side of the lower pressing ring. The lower pressing ring is positioned on the supporting disc through the positioning pin, a plurality of extrusion mechanisms are installed in the lower pressing ring and evenly distributed in the circumferential direction, box bottom parts can be automatically located in the center of equipment, workpieces of different specifications are matched with different lower pressing rings, and the positioning and supporting effects are achieved. A positioning hole is formed in the flanging of the workpiece, a positioning pin is arranged on the lower pressing ring, and when the workpiece is placed, positioning consistency and position precision of the front workpiece and the rear workpiece are guaranteed through the positioning pin.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a positioning structure for clamping elliptical special-shaped parts. Background Art

[0002] In industrial production, it is often necessary to fix elliptical special-shaped parts for subsequent processing or assembly. Due to the special size and shape of special-shaped parts, it is difficult to clamp and fix them, especially large-tonnage special-shaped parts, which are extremely difficult to control and extremely cumbersome to process due to their heavy weight. Traditional fixing methods usually use bolts or nuts to fix elliptical special-shaped parts directly on the fixture. When placing elliptical special-shaped parts, it is difficult to achieve precise positioning, and the workpiece needs to be adjusted multiple times to align the mounting holes. In addition, each workpiece must be equipped with a set of fixtures, which will cause great waste when there are too many workpiece models. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned problem and provide a positioning structure for clamping elliptical special-shaped parts, which can ensure the accurate positioning of elliptical special-shaped parts; and for different types of special-shaped workpieces, only the upper and lower pressure rings need to be replaced without replacing the clamping mechanism, which can greatly save the clamping cost while achieving accurate positioning.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A positioning structure for clamping an elliptical special-shaped part comprises a base, a lower pressing ring arranged on the base for supporting the flange of the special-shaped part, an upper pressing ring arranged on the lower pressing ring for pressing the flange of the special-shaped part, and a plurality of extrusion mechanisms for extruding the workpiece are evenly arranged on the inner side of the lower pressing ring.

[0006] Furthermore, the base is provided with a plurality of first positioning pins for positioning the lower pressure ring, and the lower pressure ring is provided with a plurality of second positioning pins for positioning the upper pressure ring.

[0007] Furthermore, a groove cooperating with the flange of the special-shaped part is provided on the inner side of the lower surface of the upper pressure ring.

[0008] Furthermore, the extrusion mechanism includes a slide groove arranged on the inner side of the lower pressure ring, a slider arranged in the slide groove and sliding in the slide groove, and a compression spring is provided between an outer end of the slider and an inner wall of the slide groove.

[0009] Furthermore, an extrusion wheel is provided at one inner end of the sliding block.

[0010] Furthermore, the shape of the lower pressing ring and the shape of the upper pressing ring correspond to the shape of the special-shaped part.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model includes a base, a lower pressure ring arranged on the base for supporting the flange of the special-shaped part, and an upper pressure ring arranged on the lower pressure ring for pressing the flange of the special-shaped part. A plurality of extrusion mechanisms for extruding the workpiece are evenly arranged on the inner side of the lower pressure ring. The lower pressure ring is positioned on the support plate by a positioning pin. A plurality of extrusion mechanisms are installed in the lower pressure ring, which are evenly distributed around the circumference, so that the workpiece can be automatically located at the center of the equipment. Different specifications of workpieces are equipped with different lower pressure rings to play a role in positioning and supporting. A positioning hole is provided on the upper side of the flange of the workpiece, and a positioning pin is provided on the lower pressure ring. When the workpiece is placed, the positioning pin ensures the consistency and position accuracy of the front and rear workpiece positioning. By replacing the lower pressure ring and the upper pressure ring, the clamping requirements of elliptical workpieces of different models can be met, and the clamping is firm and the positioning is accurate, which can avoid the problem of low workpiece processing accuracy caused by the movement of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a top view of the utility model;

[0016] Figure 3 This is a schematic diagram of the base structure of the utility model;

[0017] Figure 4 The structure of the lower pressure ring of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 5 This is a top view of the lower pressure ring of the utility model;

[0019] Figure 6 The structure of the lower pressure ring of the utility model is shown in FIG. Figure 2 ;

[0020] Figure 7 It is a schematic diagram of the structure of the upper pressure ring of the utility model.

[0021] In the figure: base 1, lower pressure ring 2, upper pressure ring 3, first positioning pin 4, second positioning pin 5, slot 6, slide slot 7, slider 8, compression spring 9, extrusion wheel 10. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0023] like Figure 1 and Figure 2 As shown, a positioning structure for clamping an elliptical special-shaped part comprises a base 1, a lower pressure ring 2 arranged on the base 1 for supporting the flange of the special-shaped part, and an upper pressure ring 3 arranged on the lower pressure ring 2 for pressing the flange of the special-shaped part. The base 1 is used to support the entire device, and fixed shafts are provided at both ends of the base 1, which are rotatably connected to the machine tool. The lower pressure ring 2 is placed at the bottom of the flange of the workpiece for positioning the workpiece and fixed to the base 1. The upper pressure ring 3 is placed on the upper part of the workpiece for fixing the workpiece and connected to the lower pressure ring. A number of extrusion mechanisms for extruding the workpiece are evenly arranged on the inner side of the lower pressure ring 2.

[0024] The device consists of a support plate, a lower pressing ring and an upper pressing ring. The lower pressing ring is quickly fixed on the support plate by a clamp using hydraulic pressure. The upper pressing ring is placed on the flange of the workpiece and is hydraulically pressed by a clamp. This device has a simple structure and is easy to operate. It is suitable for fixing various elliptical special-shaped parts. This can reduce the deformation caused by fixing the workpiece and ensure that the workpiece will not be displaced during processing or assembly.

[0025] The lower pressing ring is positioned on the support plate by the positioning pin. Three extrusion mechanisms are installed in the lower pressing ring, which are evenly distributed around the circumference, so that the workpiece can be automatically placed in the center of the equipment. Different specifications of workpieces are equipped with different lower pressing rings to play the role of positioning and support. There are positioning holes on the upper edge of the workpiece, and there are positioning pins on the lower pressing ring. When the workpiece is placed, the positioning pins ensure the consistency and position accuracy of the front and rear workpiece positioning. By replacing the lower pressing ring 2 and the upper pressing ring 3, the clamping requirements of different types of elliptical workpieces can be met, and the clamping is firm and the positioning is accurate, which can avoid the problem of low workpiece processing accuracy caused by workpiece movement.

[0026] like Figure 3 , Figure 4 and Figure 6 As shown, the base 1 is provided with a plurality of first positioning pins 4 for positioning the lower pressing ring 2, and the lower pressing ring 2 is provided with a plurality of second positioning pins 5 for positioning the upper pressing ring 3. In this embodiment, there are four first positioning pins 4 and four second positioning pins 5. The positioning pins are used to position the upper and lower pressing rings to prevent the pressing rings from shifting due to their own weight after the workpiece is installed, thereby ensuring the consistency and position accuracy of the front and rear workpiece positioning.

[0027] like Figure 7 As shown, the inner side of the lower surface of the upper pressing ring 3 is provided with a groove 6 that cooperates with the flange of the special-shaped part. After the upper pressing ring 3 presses the flange position, the groove 6 can locate the flange position to ensure that the workpiece will not move.

[0028] like Figure 5 As shown, the extrusion mechanism includes a slide groove 7 arranged on the inner side of the lower pressure ring 2, a slider 8 arranged in the slide groove 7 and sliding in the slide groove 7, a compression spring 9 is provided between the outer end of the slider 8 and the inner wall of the slide groove 7, the inner end of the compression spring 9 contacts the slider 8, and the outer end of the compression spring 9 contacts the inner wall of the slide groove 7. Under the action of the compression spring 9, the slider 8 is squeezed inward, thereby pressing the special-shaped part.

[0029] like Figure 5 As shown, an extrusion wheel 10 is provided at one inner end of the slider 8. The extrusion wheel 10 can prevent the slider from damaging the special-shaped part when placing the special-shaped part.

[0030] The shape of the lower pressing ring 2 and the shape of the upper pressing ring 3 correspond to the shape of the special-shaped part.

[0031] In the description of the present invention, it should be noted that the terms "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection, it can be a direct connection, it can be an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A positioning structure for clamping an elliptical shaped part, characterized in that: The invention comprises a base (1), a lower pressing ring (2) arranged on the base (1) for supporting the flange of the special-shaped part, and an upper pressing ring (3) arranged on the lower pressing ring (2) for pressing the flange of the special-shaped part. A plurality of extrusion mechanisms for extruding the workpiece are evenly arranged on the inner side of the lower pressing ring (2).

2. A positioning structure for clamping an elliptical shaped part according to claim 1, characterized in that: The base (1) is provided with a plurality of first positioning pins (4) for positioning the lower pressing ring (2), and the lower pressing ring (2) is provided with a plurality of second positioning pins (5) for positioning the upper pressing ring (3).

3. The positioning structure for clamping an elliptical shaped part according to claim 1, characterized in that: The inner side of the lower surface of the upper pressing ring (3) is provided with a clamping groove (6) which cooperates with the flange of the special-shaped part.

4. The positioning structure for clamping an elliptical shaped part according to claim 1, characterized in that: The extrusion mechanism comprises a slide groove (7) arranged on the inner side of the lower pressure ring (2), a slider (8) arranged in the slide groove (7) and sliding in the slide groove (7), and a compression spring (9) is provided between an outer end of the slider (8) and an inner wall of the slide groove (7).

5. A positioning structure for clamping an elliptical shaped part as claimed in claim 4, characterized in that: An extrusion wheel (10) is provided at one inner end of the slider (8).

6. The positioning structure for clamping an elliptical shaped part according to claim 1, characterized in that: The shape of the lower pressing ring (2) and the shape of the upper pressing ring (3) correspond to the shape of the special-shaped part.

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