Auxiliary positioning clamp for special-shaped workpiece

Abstract

The utility model discloses an auxiliary positioning fixture for a special-shaped workpiece, which comprises a base arranged on a numerical control indexing turntable, the base is provided with a first positioning surface, a supporting surface and a second positioning surface which are matched with the shape of a flange of the workpiece, and the base is also provided with a locking component. The base is arranged on the numerical control indexing table, and the first positioning face matched with the flange of the workpiece in appearance, the supporting face matched with the end face of the workpiece and the second positioning face matched with the inner hole of the workpiece are arranged on the base, so that three faces of the workpiece are positioned, and the positioning precision is ensured; the device has the advantages that the structure is simple, and positioning and locking are convenient, meanwhile, after a through hole in the end face is machined, the base is rotated by 90 degrees through the numerical control indexing rotary table, and then a through hole in the side face can be machined; the requirement for perpendicularity between the axis of the through hole in the end face of the workpiece and the axis of the through hole in the side face of the workpiece can be met.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically to an auxiliary positioning fixture for irregularly shaped workpieces. Background Technology

[0002] In processing such as Figure 3 and Figure 4 When processing the workpiece shown, the perpendicularity requirement between the axis of the through hole on the end face of the workpiece and the axis of the through hole on the side face is high. It is difficult to meet the processing accuracy requirements using traditional fixtures. In order to ensure processing accuracy and reduce the number of clamping operations, this utility model was developed. Utility Model Content

[0003] To address the aforementioned technical problem that traditional fixtures in the prior art cannot meet the accuracy requirements for the perpendicularity of through holes on the end face and side face of a workpiece, the technical solution adopted by this utility model is as follows: An auxiliary positioning fixture for irregularly shaped workpieces, comprising: a base disposed on a CNC indexing turntable, wherein the base is provided with a first positioning surface that matches the shape of the flange of the workpiece, a support surface that matches the end face of the workpiece, and a second positioning surface that matches the inner hole of the workpiece; the first positioning surface, the support surface, and the second positioning surface form a positioning groove that matches the flange of the workpiece; and the base is further provided with a locking component for locking the workpiece on the base.

[0004] As described above, an auxiliary positioning fixture for irregularly shaped workpieces is provided with through holes on the flange of the workpiece, and threaded holes corresponding to the through holes are provided in the positioning groove. The locking component is a locking bolt that passes through the through holes and is threadedly connected to the threaded holes.

[0005] As described above, an auxiliary positioning fixture for irregularly shaped workpieces includes a locking assembly comprising: a locking seat having a through hole for the workpiece to pass through; a flange of the workpiece located between a positioning groove and the locking seat; locking blocks for locking the locking seat onto a base on both the left and right sides of the locking seat; a locking slot for locking the locking seat onto the base by engaging with the side of the locking seat; a limiting block for positioning the locking blocks fixedly connected to the base; a recess for sliding the locking blocks on one side of the limiting block; and a locking drive mechanism for driving each locking block to engage the locking slot on the locking block with the locking seat.

[0006] As described above, an auxiliary positioning fixture for irregularly shaped workpieces includes a locking drive mechanism comprising: a drive base, a drive rod, a connecting rod, and a handle. The drive base is connected to a base, the drive rod is slidably connected to the drive base, the handle is pivotally connected to the drive base, one end of the connecting rod is hinged to the drive rod, and one end of the connecting rod is hinged to the handle.

[0007] As described above, an auxiliary positioning fixture for irregularly shaped workpieces has a T-slot on the locking block and a connector at the front end of the drive rod that can be engaged into the T-slot.

[0008] As described above, an auxiliary positioning fixture for irregularly shaped workpieces is provided with a threaded nut on the connector for locking the connector in a T-slot.

[0009] As described above, an auxiliary positioning fixture for irregularly shaped workpieces has a first inclined surface at the position where the two sides of the locking seat contact the bayonet, and a second inclined surface that cooperates with the first inclined surface is provided inside the bayonet.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model achieves positioning of three surfaces of the workpiece by setting the base on a CNC indexing turntable and setting a first positioning surface that matches the shape of the workpiece flange, a support surface that matches the end face of the workpiece, and a second positioning surface that matches the inner hole of the workpiece on the base. This ensures positioning accuracy. The workpiece is locked on the base by a locking component. It has the advantages of simple structure and convenient positioning and locking. At the same time, after the through hole on the end face is machined, the base can be rotated 90 degrees by the CNC indexing turntable to machine the through hole on the side. This ensures the perpendicularity between the axis of the through hole on the end face of the workpiece and the axis of the through hole on the side.

[0012] 2. When using the locking assembly of this utility model, the workpiece is first passed through the through hole of the locking seat and the flange of the workpiece is placed in the positioning groove on the base. Then, the locking drive mechanism drives each locking block to move, so that the bayonet on the locking block is locked on the locking seat. This can quickly lock the locking seat and the workpiece on the base, improving the clamping efficiency. Attached Figure Description

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

[0014] Figure 2 This is an exploded view of Embodiment 1 of the present invention;

[0015] Figure 3 for Figure 2 An enlarged view of part A marked in the middle;

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

[0017] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0018] Figure 6 for Figure 5 An enlarged view of section B marked in the middle;

[0019] Figure 7 This is an exploded view of Embodiment 2 of the present invention;

[0020] Figure 8 for Figure 7 A magnified view of section C marked in the middle;

[0021] Figure 9 This is a schematic diagram of the locking drive mechanism in this utility model. Detailed Implementation

[0022] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] like Figures 1 to 9 As shown, this utility model has two embodiments, which will now be described separately.

[0024] Example 1:

[0025] like Figures 1 to 4 As shown, an auxiliary positioning fixture for irregularly shaped workpieces according to this embodiment includes: a base 1 disposed on a CNC indexing turntable 1000; a first positioning surface 101 on the base 1 that matches the shape of the flange 801 of the workpiece 800; a support surface 102 on the base 1 that matches the end face of the workpiece 800; a second positioning surface 103 on the base 1 that matches the inner hole of the workpiece 800; the first positioning surface 101, the support surface 102, and the second positioning surface 103 forming a positioning groove 104 that matches the flange of the workpiece 800; and a locking component 2 on the base 1 for locking the workpiece 800 onto the base 1. This invention achieves positioning of three surfaces of the workpiece by setting a base on a CNC indexing turntable and providing a first positioning surface that matches the shape of the workpiece flange, a support surface that matches the end face of the workpiece, and a second positioning surface that matches the inner hole of the workpiece. This ensures positioning accuracy. A locking component is used to lock the workpiece onto the base. This design has the advantages of simple structure and convenient positioning and locking. Furthermore, after machining the through hole on the end face, the base can be rotated 90 degrees by the CNC indexing turntable to machine the through hole on the side, ensuring the perpendicularity between the axis of the through hole on the end face of the workpiece and the axis of the through hole on the side.

[0026] In this embodiment, the flange 801 of the workpiece 800 is provided with a through hole 802, and the positioning groove 104 is provided with threaded holes 1041 corresponding to the through holes 802. The locking assembly 2 is a locking bolt that passes through the through hole 802 and is threadedly connected to the threaded hole 1041. The workpiece can be locked onto the base by the four locking bolts.

[0027] Example 2:

[0028] like Figures 4-9 As shown, the difference between this embodiment and embodiment 1 is that in embodiment 1, the workpiece can be locked onto the base by four locking bolts, which is relatively time-consuming. Therefore, the locking component 2 in this embodiment adopts a different design.

[0029] In this embodiment, the locking assembly 2 includes: a locking seat 21, which has a through hole 201 for the workpiece 800 to pass through. The flange 801 of the workpiece 800 is located between the positioning groove 104 and the locking seat 21. The left and right sides of the locking seat 21 are respectively provided with locking blocks 22 for locking the locking seat 21 onto the base 1. The locking blocks 22 are provided with a latch 220 that cooperates with the side of the locking seat 21 to lock the locking seat 21 onto the base 1. The base 1 is fixedly connected with a limiting block 23 for positioning the locking blocks 22. One side of the limiting block 23 is provided with a notch 230 for the locking blocks 22 to slide within it. The base 1 is also provided with a locking drive mechanism 24 for driving each locking block 22 to move so that the latch 220 on the locking block 22 locks the locking seat 21. When using the locking assembly of this utility model, the workpiece is first passed through the through hole of the locking seat and the flange of the workpiece is placed in the positioning groove on the base. Then, the locking drive mechanism drives each locking block to move, so that the latch on the locking block is locked onto the locking seat. This can quickly lock the locking seat and the workpiece on the base, improving the clamping efficiency.

[0030] In this embodiment, the locking drive mechanism 24 includes: a drive base 241, a drive rod 242, a connecting rod 243, and a handle 244. The drive base 241 is connected to the base 1. The drive rod 242 is slidably connected to the drive base 241. The handle 244 is pivotally connected to the drive base 241. One end of the connecting rod 243 is hinged to the drive rod 242, and the other end of the connecting rod 243 is hinged to the handle 244. By pulling the handle, the drive rod can be pushed out and held in the pushed-out position to maintain the locked state; pulling the handle back can unlock the mechanism, which has the advantage of being easy to use.

[0031] In this embodiment, the locking block 22 is provided with a T-slot 2201, and the front end of the drive rod 242 is provided with a connector 2421 that can be inserted into the T-slot 2201. It has the advantages of simple structure and convenient processing.

[0032] In this embodiment, the connector 2421 is provided with a threaded nut 2422 for locking the connector 2421 in the T-slot 2201. This has the advantage of easy assembly.

[0033] In this embodiment, the two sides of the locking seat 21 are provided with first inclined surfaces 210 at the positions where they contact the bayonet 220, and the bayonet 220 is provided with second inclined surfaces 2202 that cooperate with the first inclined surfaces 210. The cooperation of the first and second inclined surfaces ensures the reliability of the locking seat.

[0034] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. An auxiliary positioning fixture for irregularly shaped workpieces, comprising: A base (1) set on a CNC indexing rotary table (1000) is characterized in that the base (1) is provided with a first positioning surface (101) that matches the shape of the flange (801) of the workpiece (800), a support surface (102) that matches the end face of the workpiece (800), a second positioning surface (103) that matches the inner hole of the workpiece (800), the first positioning surface (101), the support surface (102) and the second positioning surface (103) form a positioning groove (104) that matches the flange of the workpiece (800), and the base (1) is also provided with a locking component (2) for locking the workpiece (800) on the base (1).

2. The auxiliary positioning fixture for irregularly shaped workpieces according to claim 1, characterized in that, The flange (801) of the workpiece (800) is provided with a through hole (802), and the positioning groove (104) is provided with a threaded hole (1041) corresponding to the through hole (802). The locking component (2) is a locking bolt that passes through the through hole (802) and is threadedly connected to the threaded hole (1041).

3. The auxiliary positioning fixture for irregularly shaped workpieces according to claim 1, characterized in that, The locking assembly (2) includes: a locking seat (21), which has a through hole (201) for the workpiece (800) to pass through. The flange (801) of the workpiece (800) is located between the positioning groove (104) and the locking seat (21). The left and right sides of the locking seat (21) are respectively provided with locking blocks (22) for locking the locking seat (21) onto the base (1). The locking blocks (22) are provided to cooperate with the side of the locking seat (21) to lock the locking seat (21) onto the base (1). The locking seat (21) is locked in the slot (220) on the base (1). The base (1) is fixedly connected to a limiting block (23) for positioning the locking block (22). One side of the limiting block (23) is provided with a notch (230) in which the locking block (22) can slide. The base (1) is also provided with a locking drive mechanism (24) that drives each locking block (22) to move so that the slot (220) on the locking block (22) locks the locking seat (21).

4. The auxiliary positioning fixture for irregularly shaped workpieces according to claim 3, characterized in that, The locking drive mechanism (24) includes: a drive seat (241), a drive rod (242), a connecting rod (243), and a handle (244). The drive seat (241) is connected to the base (1). The drive rod (242) is slidably connected to the drive seat (241). The handle (244) is pivotally connected to the drive seat (241). One end of the connecting rod (243) is hinged to the drive rod (242), and one end of the connecting rod (243) is hinged to the handle (244).

5. An auxiliary positioning fixture for irregularly shaped workpieces according to claim 4, characterized in that, The locking block (22) is provided with a T-slot (2201), and the front end of the drive rod (242) is provided with a connector (2421) that can be inserted into the T-slot (2201).

6. An auxiliary positioning fixture for irregularly shaped workpieces according to claim 5, characterized in that, The connector (2421) is provided with a nut (2422) for locking the connector (2421) in the T-slot (2201) via a threaded connection.

7. An auxiliary positioning fixture for irregularly shaped workpieces according to claim 3, characterized in that, The locking seat (21) has a first inclined surface (210) at the position where it contacts the bayonet (220), and the bayonet (220) has a second inclined surface (2202) that cooperates with the first inclined surface (210).

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