Positioning clamp for special-shaped workpiece machining

Abstract

The utility model discloses a special-shaped workpiece processing positioning fixture, which comprises a base and a plurality of clamping mechanisms, the outer wall of the base is fixedly connected with a plurality of fixing lugs, the top of the base is provided with a plurality of positioning holes used for installing the clamping mechanisms, each clamping mechanism comprises a vertical pipe, and the vertical pipe is provided with a plurality of positioning holes used for installing the clamping mechanisms. The bottom end of the vertical pipe is detachably connected with the positioning hole; when the special-shaped workpiece clamping device is used, after a special-shaped workpiece is placed on the base, the multiple clamping mechanisms are evenly distributed on the periphery of the special-shaped workpiece, the vertical pipes of the clamping mechanisms are fixedly connected with the corresponding positioning holes, then the hoops are installed on the vertical pipes, the clamping plates are aligned to the special-shaped workpiece in the horizontal direction, and finally the long-rod bolts are tightened gradually. According to the special-shaped workpiece clamping device, the clamping plates are arranged, so that the clamping plates make close contact with a special-shaped workpiece, the special-shaped workpiece can be fixedly clamped, the stability of the special-shaped workpiece during machining is guaranteed, after machining is completed, the special-shaped workpiece can be taken down only by unscrewing part of the long-rod bolts, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a positioning clamp for processing special-shaped workpieces. Background Art

[0002] In the process of mechanical processing of workpieces, fixtures are often used to fasten and clamp the workpieces to ensure the stability of the workpieces during processing and improve the processing effect. Currently, the fixtures used for workpiece processing are mostly bench vises and self-centering chucks. The former are mostly used to clamp regular cubic workpieces, and the latter are used to clamp cylindrical workpieces. However, in the process of processing larger special-shaped workpieces, bench vises and self-centering chucks are not applicable. At present, the industry mostly uses customized tooling to position and clamp special-shaped parts, but customized tooling is undoubtedly costly and is not suitable for small batches of special-shaped parts. For this reason, we propose a positioning fixture for processing special-shaped workpieces. Utility Model Content

[0003] The purpose of the utility model is to provide a positioning fixture for processing special-shaped workpieces to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A positioning fixture for processing special-shaped workpieces comprises a base and a plurality of clamping mechanisms, wherein the outer wall of the base is fixedly connected with a plurality of fixing ears, the top of the base is provided with a plurality of positioning holes for installing the clamping mechanisms, the clamping mechanism comprises a vertical pipe, the bottom end of the vertical pipe is detachably connected to the positioning hole, the outer wall of the vertical pipe is connected with a connecting seat via a clamp, the outer wall of the connecting seat is fitted with a long-rod bolt via a threaded hole, and the threaded end of the long-rod bolt is rotatably connected with a clamping plate.

[0006] As a further solution of the utility model: a plurality of open grooves are provided at the bottom end of the outer wall of the riser, and the plurality of open grooves divide the bottom end of the riser into a plurality of petals, and the outer wall of the petals is provided with anti-slip grooves, and a pull rod is passed through the riser, and a cone head is fixedly connected to the bottom end of the pull rod, and a nut is sleeved on the top end of the pull rod after passing through the riser.

[0007] As a further solution of the utility model: the outer wall of the riser located above the petal body is fixedly sleeved with a retaining ring, the inner wall of the top opening of the riser is fixedly connected with a guide block, the outer wall of the pull rod is provided with a guide groove, and the guide block is located in the guide groove.

[0008] As a further solution of the utility model: the clamp includes two clamp seats interconnected by bolts, the clamp seats are arc-shaped, and the clamp seats are adapted to the outer diameter of the riser, and the connecting seat is fixedly connected to one clamp seat.

[0009] As a further solution of the utility model: a guide rod is slidably penetrated through the outer wall of the connecting seat, the guide rod is fixedly connected to the clamping plate, the end of the connecting seat is connected with a top screw through a threaded hole, and the threaded end of the top screw is against the outer wall of the guide rod.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] When the utility model is in use, after the special-shaped workpiece is placed on the base, a plurality of clamping mechanisms are evenly distributed around the special-shaped workpiece, and the vertical pipes of the clamping mechanisms are fixedly connected to the corresponding positioning holes, and then a clamp is installed on the vertical pipe to align the clamping plate with the special-shaped workpiece in the horizontal direction, and finally each long rod bolt is gradually tightened to make each clamping plate in close contact with the special-shaped workpiece, so as to achieve fixed clamping of the special-shaped workpiece to ensure the stability of the special-shaped workpiece during processing. After completing the processing, the special-shaped workpiece can be removed by only loosening some of the long rod bolts, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The figure is a schematic diagram of the structure of a positioning fixture for processing special-shaped workpieces.

[0013] Figure 2 The figure is a top view structural schematic diagram of a clamping mechanism in a positioning fixture for processing special-shaped workpieces.

[0014] Figure 3 The present invention is a schematic diagram of the cross-sectional structure of a central column of a positioning fixture for processing special-shaped workpieces.

[0015] Figure 4 The present invention is a schematic diagram of the structure of an open slot in a positioning fixture for processing special-shaped workpieces.

[0016] Among them, there are base 1, fixing ear 2, positioning hole 3, clamping mechanism 4, riser 5, retaining ring 6, opening groove 7, petal body 8, pull rod 9, cone head 10, nut 11, guide groove 12, guide block 13, clamp seat 14, connecting seat 15, long rod bolt 16, splint 17, guide rod 18, and top screw 19. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail in conjunction with the embodiments below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0019] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation in the specification, and therefore cannot be understood as a limitation on the present invention.

[0020] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0021] See also Figures 1 to 4 In an embodiment of the utility model, a positioning fixture for processing special-shaped workpieces includes a base 1 and a plurality of clamping mechanisms 4, the outer wall of the base 1 is fixedly connected with a plurality of fixing ears 2, the top of the base 1 is provided with a plurality of positioning holes 3 for installing the clamping mechanisms 4, the clamping mechanism 4 includes a vertical pipe 5, the bottom end of the vertical pipe 5 is detachably connected to the positioning hole 3, the outer wall of the vertical pipe 5 is connected with a connecting seat 15 through a clamp, the outer wall of the connecting seat 15 is cooperated with a long rod bolt 16 through a threaded hole, and the threaded end of the long rod bolt 16 is rotatably connected with a clamp plate 17.

[0022] The utility model adopts the above scheme. When in use, after the special-shaped workpiece is placed on the base 1, multiple clamping mechanisms are evenly distributed around the special-shaped workpiece, and the vertical pipe 5 of the clamping mechanism 4 is fixedly connected to the corresponding positioning hole 3, and then a clamp is installed on the vertical pipe 5 to align the clamping plate 17 with the special-shaped workpiece in the horizontal direction, and finally each long rod bolt 16 is gradually tightened to make each clamping plate 17 closely contact with the special-shaped workpiece, so as to achieve fixed clamping of the special-shaped workpiece to ensure the stability of the special-shaped workpiece during processing. After the processing is completed, the special-shaped workpiece can be removed by loosening some of the long rod bolts 16. The operation is simple and convenient, and the clamping plate 17 at the end of the long rod bolt 16 that has not been loosened can be used as a reference surface for positioning and clamping the next special-shaped workpiece, so that the clamp has a certain repeated clamping accuracy and a good use effect.

[0023] Specific combination Figure 3 and Figure 4 In one embodiment of the utility model, a plurality of open grooves 7 are provided at the bottom end of the outer wall of the riser 5, and the plurality of open grooves 7 divide the bottom end of the riser 5 into a plurality of petals 8. The outer wall of the petal body 8 is provided with anti-slip grooves. A pull rod 9 is passed through the riser 5, and a cone head 10 is fixedly connected to the bottom end of the pull rod 9. After the top end of the pull rod 9 passes through the riser 5, a nut 11 is sleeved through an external thread.

[0024] By rotating the nut 11 on the pull rod 9, the threaded cooperation of the nut 11 and the pull rod 9 can be utilized to drive the pull rod 9 to drive the cone head 10 to move upward, so that the cone head 10 expands each petal body 8 outward, thereby making the outer wall of each petal body 8 close to the inner wall of the positioning hole 3, so as to fix the bottom end of the vertical pipe 5 in the positioning hole 3, and the operation is simple and convenient.

[0025] Specific combination Figure 3 and Figure 4 On the basis of the previous embodiment, further, the outer wall of the riser 5 located above the petal body 8 is fixedly sleeved with a retaining ring 6, the inner wall of the top opening of the riser 5 is fixedly connected with a guide block 13, the outer wall of the pull rod 9 is provided with a guide groove 12, and the guide block 13 is located in the guide groove 12.

[0026] By setting the retaining ring 6, the length of the vertical pipe 5 inserted into the positioning hole 3 can be positioned, and the cooperation of the guide groove 12 and the guide block 13 can guide the pull rod 9 in the vertical pipe 5 to prevent the pull rod 9 from rotating with the nut 11.

[0027] Specific combination Figure 2 In one embodiment of the utility model, the clamp includes two clamp seats 14 connected to each other by bolts, the clamp seats 14 are arc-shaped, and the clamp seats 14 are adapted to the outer diameter of the riser 5, and the connecting seat 15 is fixedly connected to one clamp seat 14. The clamp consists of two clamp seats 14 and bolts. The connecting seat 15 can be fixed on the riser 5 at the required height and angle by tightening the bolts, which is simple and convenient to operate.

[0028] Specific combination Figure 2 In one embodiment of the utility model, a guide rod 18 is slidably penetrated through the outer wall of the connecting seat 15, and the guide rod 18 is fixedly connected to the clamping plate 17. The end of the connecting seat 15 is connected with a top screw 19 through a threaded hole, and the threaded end of the top screw 19 is against the outer wall of the guide rod 18.

[0029] The guide rod 18 can guide the clamping plate 17 to prevent the clamping plate 17 from rotating with the long rod bolt 16. By tightening the top screw 19, the guide rod 18 can be fixed on the connecting seat 15, thereby locking the clamping plate 17.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positioning fixture for processing special-shaped workpieces, characterized in that: The invention comprises a base (1) and a plurality of clamping mechanisms (4), wherein the outer wall of the base (1) is fixedly connected with a plurality of fixing ears (2), the top of the base (1) is provided with a plurality of positioning holes (3) for installing the clamping mechanisms (4), the clamping mechanism (4) comprises a vertical pipe (5), the bottom end of the vertical pipe (5) is detachably connected with the positioning hole (3), the outer wall of the vertical pipe (5) is connected with a connecting seat (15) through a clamp, the outer wall of the connecting seat (15) is fitted with a long rod bolt (16) through a threaded hole, and the threaded end of the long rod bolt (16) is rotatably connected with a clamping plate (17).

2. A positioning fixture for processing special-shaped workpieces according to claim 1, characterized in that: A plurality of open grooves (7) are provided at the bottom end of the outer wall of the stand pipe (5), and the plurality of open grooves (7) divide the bottom end of the stand pipe (5) into a plurality of petals (8). The outer wall of the petals (8) is provided with anti-slip grooves. A pull rod (9) is passed through the inside of the stand pipe (5), and a cone head (10) is fixedly connected to the bottom end of the pull rod (9). After the top end of the pull rod (9) passes through the stand pipe (5), a nut (11) is sleeved on the top end of the pull rod (9) through an external thread.

3. A positioning fixture for processing special-shaped workpieces according to claim 2, characterized in that: The outer wall of the riser (5) located above the petal body (8) is fixedly sleeved with a retaining ring (6), the inner wall of the top opening of the riser (5) is fixedly connected with a guide block (13), the outer wall of the pull rod (9) is provided with a guide groove (12), and the guide block (13) is located in the guide groove (12).

4. The positioning fixture for processing special-shaped workpieces according to claim 1, characterized in that: The clamp comprises two clamp seats (14) connected to each other by bolts, the clamp seats (14) are arc-shaped, and the clamp seats (14) are adapted to the outer diameter of the standpipe (5), and the connecting seat (15) is fixedly connected to one clamp seat (14).

5. The positioning fixture for processing special-shaped workpieces according to claim 1, characterized in that: A guide rod (18) is slidably penetrated through the outer wall of the connecting seat (15), and the guide rod (18) is fixedly connected to the clamping plate (17). The end of the connecting seat (15) is connected to a top screw (19) through a threaded hole, and the threaded end of the top screw (19) abuts against the outer wall of the guide rod (18).

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