Positioning clamp tool for three-coordinate measuring machine

Abstract

The utility model provides a positioning clamp tool for a three-coordinate measuring machine, and relates to the technical field of positioning clamps, the positioning clamp tool for the three-coordinate measuring machine comprises a base, two side surfaces of the base are connected with fixing plates, and the base can be installed at a proper position on the three-coordinate measuring machine through the fixing plates. At least one group of clamping assemblies are movably mounted on the base, each clamping assembly comprises a mounting seat movably mounted on the base, and an angle-adjustable mounting plate is arranged on one side of each mounting seat; the position and angle of the workpiece positioning structures connected with the mounting plate and the rotating plate can be adjusted, the contact area with the special-shaped workpiece is increased through the multiple workpiece positioning structures, positioning and clamping operation can be conducted on multiple point positions of the special-shaped workpiece, the stability of the special-shaped workpiece is guaranteed, and the working efficiency is improved. Therefore, the situation that the position of the special-shaped workpiece deviates in the measuring process of the three-coordinate measuring machine is avoided, and the measuring precision is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of positioning fixture technology, specifically a positioning fixture tooling for a coordinate measuring machine. Background Technology

[0002] Coordinate measuring machines (CMMs) are widely used in industries such as machinery, electronics, instrumentation, and plastics. They are one of the most efficient methods for measuring and obtaining dimensional data because they can replace various surface measuring tools and expensive combination gauges, reducing the time required for complex measurement tasks from hours to minutes. CMMs require positioning fixtures to clamp and fix the workpiece, preventing movement or deformation during measurement and ensuring measurement accuracy.

[0003] Current positioning fixtures typically use fastening screws and clamping blocks to clamp the workpiece to be measured. While this method can stably clamp some workpieces, when dealing with irregularly shaped workpieces, the contact area between the clamping block and the workpiece is small. This can cause the position of the irregularly shaped workpiece to deviate during measurement by a coordinate measuring machine, thus affecting the measurement accuracy. Utility Model Content

[0004] The purpose of this invention is to provide a positioning fixture for a coordinate measuring machine, aiming to solve the problems in the prior art.

[0005] To achieve the above objectives, one embodiment of this utility model provides a positioning fixture for a coordinate measuring machine, including a base. At least one set of clamping components is movably mounted on the base. Each clamping component includes a mounting seat movably mounted on the base. One side of the mounting seat has an adjustable-angle mounting plate. A rotating plate is rotatably connected to the end of the mounting plate. Multiple sets of clamping structures are provided on both the mounting plate and the rotating plate. An adjustment structure for adjusting the angle of the rotating plate is provided between the mounting plate and the rotating plate. The adjustment structure can be adjusted along the length direction of the mounting plate via a displacement adjustment structure. One end of the adjustment structure is hinged to the mounting plate via the displacement adjustment structure. The length of the adjustment structure is adjustable, and its other end is hinged to the rotating plate.

[0006] Preferably, the adjustment structure includes a housing structure, an extension rod is slidably connected inside the housing structure, the end of the extension rod is hinged to the rotating plate, a plurality of adjustment holes are provided on one side of the extension rod, and a plurality of adjustment bolts adapted to the size of the adjustment holes are threadedly connected to one side of the housing structure, the adjustment bolts are inserted into the interior of the adjustment holes, and adjustment nuts are threadedly connected to the outer surface of the adjustment bolts.

[0007] Preferably, the displacement adjustment structure includes a slide rail mounted on a mounting plate, the top side of the slide rail having a plurality of fixing holes, a slide block slidably connected to the slide rail that can move along the length of the slide rail and is hinged to the housing structure, and a fixing bolt threaded to one side of the slide block and adapted to the size of the fixing hole, the fixing bolt being threaded inside the fixing hole.

[0008] Preferably, the clamping structure includes a hollow mounting sleeve, the inside of which is provided with a detachable movable rod, and the movable rod is provided with a detachable clamping head structure.

[0009] Preferably, one end of the movable rod is fixedly connected to a clamping rod, the clamping rod passes through the mounting sleeve and is slidably connected to the mounting sleeve, one end of the clamping rod is fixedly connected to a fixing spring located inside the mounting sleeve, the end of the fixing spring away from the clamping rod is fixedly connected to a mounting plug with a T-shaped cross-section, the mounting plug is threadedly connected to the mounting sleeve, and the movable rod passes through and is slidably connected to the mounting plug.

[0010] Preferably, the clamping head structure includes a connecting threaded rod that is threadedly connected to the movable rod, and a clamping head in a semi-circular shape is fixedly connected to the end of the connecting threaded rod.

[0011] Preferably, a locking threaded rod is fixedly connected to the bottom side of the mounting base, and a butterfly locking nut is threaded onto the outer surface of the locking threaded rod. The locking threaded rod is provided with a fixing structure that connects to the mounting plate.

[0012] Preferably, the fixing structure includes a rotating rod and a support insertion hole opened on the mounting base. The rotating rod passes through the mounting base and is rotatably connected to the mounting base. The end position of the rotating rod is fixedly connected to the mounting plate. A limit block is fixedly connected to the end of the rotating rod. A support bolt corresponding to the position of the support insertion hole is threadedly connected to one side of the limit block. The support bolt is threadedly connected to the support insertion hole.

[0013] Preferably, the base includes a frame and a support mesh plate mounted on the frame, and the locking threaded rod is inserted into the mesh opening on the support mesh plate, wherein the maximum diameter of the locking threaded rod is adapted to the diameter of the mesh opening on the support mesh plate.

[0014] The beneficial effects of this utility model are:

[0015] 1. It can adjust the position and angle of the workpiece positioning structure connected to the mounting plate and rotating plate, and increases the contact area with the irregular workpiece through multiple workpiece positioning structures. It can perform positioning and clamping operations on multiple points of the irregular workpiece, ensuring the stability of the irregular workpiece. This avoids the positional displacement of the irregular workpiece during the measurement process by the coordinate measuring machine, thus ensuring the measurement accuracy.

[0016] 2. The installation plug and the installation sleeve are threaded together, making it easy to install and remove the installation plug. The connecting threaded rod and the movable rod are threaded together, making it easy to install and remove the clamping head. This facilitates the installation and removal of the movable rod and the removal of the fixed spring from the inside of the installation sleeve. When the elasticity of the fixed spring decreases or is damaged, it is easy to replace it, thus ensuring that the workpiece can be clamped stably in the future. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model without the base assembled;

[0019] Figure 3 This utility model Figure 2 Schematic diagram of the unassembled mounting base structure;

[0020] Figure 4 This is a cross-sectional structural diagram of the clamping structure of this utility model;

[0021] Figure 5 This is a structural schematic diagram of the mounting base and its connecting components of this utility model.

[0022] In the diagram: 10-base, 11-frame, 12-support mesh plate, 30-mounting seat, 31-locking threaded rod, 32-wing locking nut, 33-fixed structure, 331-rotating rod, 332-supporting insertion hole, 333-limiting block, 334-supporting bolt, 40-mounting plate, 50-slide rail, 51-fixing hole, 52-slide seat, 53-fixing bolt, 60-rotating plate, 70-mounting sleeve, 71-moving rod, 72-clamping head structure, 721-connecting threaded rod, 722-clamping head, 73-clamping rod, 74-fixing spring, 75-mounting plug, 80-adjusting structure, 81-shell structure, 82-extension rod, 83-adjusting insertion hole, 84-adjusting bolt. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings.

[0024] like Figures 1 to 5As shown, a positioning fixture for a coordinate measuring machine includes a base 10. Fixed plates are connected to both sides of the base 10, allowing the base 10 to be mounted at a suitable position on the coordinate measuring machine. At least one set of clamping assemblies is movably mounted on the base 10. Each clamping assembly includes a mounting seat 30 movably mounted on the base 10. One side of the mounting seat 30 has an adjustable-angle mounting plate 40. A rotating plate 60 is rotatably connected to the end of the mounting plate 40. Multiple sets of clamping structures are provided on both the mounting plate 40 and the rotating plate 60. An adjustment structure 80 for adjusting the angle of the rotating plate 60 is provided between the mounting plate 40 and the rotating plate 60. The adjustment structure 80 can be adjusted along the length of the mounting plate 40 via a displacement adjustment structure. One end of the adjustment structure 80 is hinged to the mounting plate 40 via the displacement adjustment structure, and the length of the adjustment structure 80 is adjustable, with its other end hinged to the rotating plate 60.

[0025] The adjustment structure 80 includes a housing structure 81, within which an extension rod 82 is slidably connected. The end of the extension rod 82 is hinged to a rotating plate 60. Multiple adjustment holes 83 are evenly distributed on one side of the extension rod 82. Several adjustment bolts 84, each matching the size of one adjustment hole 83, are threaded onto one side of the housing structure 81. The adjustment bolts 84 are inserted into the adjustment holes 83, and adjustment nuts are threaded onto their outer surfaces. By inserting the adjustment bolts 84 into the adjustment holes 83 at different positions and connecting them to the adjustment nuts, ensuring a tight fit between the adjustment bolts 84 and the housing structure 81, the extension rod 82 can be adjusted after extending a suitable length from within the housing structure 81. The fixed displacement adjustment structure includes a slide rail 50 mounted on the mounting plate 40. The length direction of the slide rail 50 is parallel to the length direction of the mounting plate 40. Several fixing holes 51 are opened on the top side of the slide rail 50. The fixing holes 51 are evenly distributed on the top side of the slide rail 50. A slide seat 52 that can move along the length direction of the slide rail 50 and is hinged to the housing structure 81 is slidably connected to the slide rail 50. A fixing bolt 53 that matches the size of the fixing hole 51 is threaded to one side of the slide seat 52. The fixing bolt 53 is threaded inside the fixing hole 51. By connecting the fixing bolt 53 to the fixing hole 51 at different positions, the slide seat 52 can be fixed in a suitable position. By adjusting the position of the slide seat 52 and the extension length of the extension rod 82, the angle between the rotating plate 60 and the mounting plate 40 can be adjusted to a suitable angle.

[0026] The clamping structure includes a hollow mounting sleeve 70. Inside the mounting sleeve 70 is a detachable movable rod 71. A detachable clamping head structure 72 is mounted on the movable rod 71. A clamping rod 73 is fixedly connected to one end of the movable rod 71, passing through the mounting sleeve 70 and slidably connected to it. A fixing spring 74 located inside the mounting sleeve 70 is fixedly connected to one end of the clamping rod 73. A T-shaped mounting plug 75 is fixedly connected to the end of the fixing spring 74 away from the clamping rod 73. The mounting plug 75 is threadedly connected to the mounting sleeve 70, and the movable rod 71 passes through it. The movable rod 71 is slidably connected to the mounting plug 75, and a knob is fixedly connected to the end of the movable rod 71. The knob facilitates the movement of the movable rod 71 by pulling it. The clamping head structure 72 includes a connecting threaded rod 721 that is threadedly connected to the movable rod 71. A semi-circular clamping head 722 is fixedly connected to the end of the connecting threaded rod 721. The clamping head 722, the connecting threaded rod 721, and the movable rod 71 are connected, making it easier to install and remove the clamping head 722. The clamping head 722 and the mounting plug 75, which are easy to install and remove, make it easy to remove the fixing spring 74 from the inside of the mounting sleeve 70.

[0027] A locking threaded rod 31 is fixedly connected to the bottom side of the mounting base 30. A butterfly locking nut 32 is threaded onto the outer surface of the locking threaded rod 31. A fixing structure 33 connected to the mounting plate 40 is provided on the locking threaded rod 31. The fixing structure 33 includes a rotating rod 331 and a support insertion hole 332 opened on the mounting base 30. The rotating rod 331 passes through the mounting base 30 and can be rotatably connected to the mounting base 30. The end of the rotating rod 331 is fixedly connected to the mounting plate 40. A limit block 333 is fixedly connected to the end of the rotating rod 331. A support bolt 334 corresponding to the position of the support insertion hole 332 is threaded onto one side of the limit block 333. Several support insertion holes 332 are distributed in a circumferential array about the rotating rod 331. The support bolt 334 is threadedly connected to the support insertion hole 332. By connecting the support bolt 334 to the support insertion hole 332 at different positions, the mounting plate 40 can be fixed at a suitable angle.

[0028] The base 10 includes a frame 11 and a support mesh plate 12 mounted on the frame 11. A locking threaded rod 31 is inserted into the mesh openings on the support mesh plate 12. The maximum diameter of the locking threaded rod 31 is adapted to the diameter of the mesh openings on the support mesh plate 12. The locking threaded rod 31 is inserted into the mesh openings at different positions on the support mesh plate 12. Then, the butterfly locking nut 32 is threadedly connected to the locking threaded rod 31, and the butterfly locking nut 32 is tightly fitted to the bottom side of the support mesh plate 12, so that the mounting base 30 can be fixed in a suitable position on the support mesh plate 12.

[0029] The working principle is as follows:

[0030] The angle between the rotating plate 60 and the mounting plate 40 is adjusted to a suitable angle by adjusting the structure 80 and the displacement adjustment structure. The mounting plate 40 is rotated to a suitable angle by adjusting the fixing structure 33 on the mounting base 30. The mounting base 30 is fixed in a suitable position by locking the threaded rod 31 and the butterfly locking nut 32. Finally, the workpiece is clamped and fixed by the clamping structure. The multiple clamping structures increase the contact points and area with the irregular workpiece, thereby stably clamping the irregular workpiece.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A positioning fixture for a coordinate measuring machine, characterized in that: The device includes a base (10), on which at least one set of clamping components are movably mounted. The clamping components include a mounting seat (30) movably mounted on the base (10). One side of the mounting seat (30) has an adjustable mounting plate (40). The end of the mounting plate (40) is rotatably connected to a rotating plate (60). Both the mounting plate (40) and the rotating plate (60) are provided with multiple sets of clamping structures. An adjustment structure (80) for adjusting the angle of the rotating plate (60) is provided between the mounting plate (40) and the rotating plate (60). The adjustment structure (80) can be adjusted along the length direction of the mounting plate (40) by a displacement adjustment structure. One end of the adjustment structure (80) is hinged to the mounting plate (40) via the displacement adjustment structure. The length of the adjustment structure (80) is adjustable and its other end is hinged to the rotating plate (60).

2. The positioning fixture for a coordinate measuring machine according to claim 1, characterized in that: The adjustment structure (80) includes a housing structure (81), an extension rod (82) is slidably connected inside the housing structure (81), the end of the extension rod (82) is hinged to the rotating plate (60), a plurality of adjustment holes (83) are provided on one side of the extension rod (82), and a plurality of adjustment bolts (84) that are adapted to the size of the adjustment holes (83) are threadedly connected to one side of the housing structure (81), the adjustment bolts (84) are inserted into the interior of the adjustment holes (83), and an adjustment nut is threadedly connected to the outer surface of the adjustment bolts (84).

3. A positioning fixture for a coordinate measuring machine according to claim 2, characterized in that: The displacement adjustment structure includes a slide rail (50) mounted on a mounting plate (40). The top side of the slide rail (50) has several fixing holes (51). A slide block (52) that can move along the length of the slide rail (50) and is hinged to the housing structure (81) is slidably connected to the slide rail (50). A fixing bolt (53) that matches the size of the fixing hole (51) is threaded to one side of the slide block (52). The fixing bolt (53) is threaded inside the fixing hole (51).

4. A positioning fixture for a coordinate measuring machine according to claim 2, characterized in that: The clamping structure includes a hollow mounting sleeve (70), and a detachable movable rod (71) is provided inside the mounting sleeve (70). A detachable clamping head structure (72) is provided on the movable rod (71).

5. A positioning fixture for a coordinate measuring machine according to claim 4, characterized in that: One end of the movable rod (71) is fixedly connected to a clamping rod (73), the clamping rod (73) passes through the mounting sleeve (70) and is slidably connected to the mounting sleeve (70), one end of the clamping rod (73) is fixedly connected to a fixing spring (74) located inside the mounting sleeve (70), the end of the fixing spring (74) away from the clamping rod (73) is fixedly connected to a mounting plug (75) with a cross-sectional shape of T, the mounting plug (75) is threadedly connected to the mounting sleeve (70), and the movable rod (71) passes through and is slidably connected to the mounting plug (75).

6. A positioning fixture for a coordinate measuring machine according to claim 5, characterized in that: The clamping head structure (72) includes a connecting threaded rod (721) that is threadedly connected to the movable rod (71), and a clamping head (722) in a semi-circular shape is fixedly connected to the end of the connecting threaded rod (721).

7. A positioning fixture for a coordinate measuring machine according to claim 5, characterized in that: The bottom side of the mounting base (30) is fixedly connected to a locking thread rod (31), and the outer surface of the locking thread rod (31) is threaded with a butterfly locking nut (32). The locking thread rod (31) is provided with a fixing structure (33) that is connected to the mounting plate (40).

8. A positioning fixture for a coordinate measuring machine according to claim 7, characterized in that: The fixed structure (33) includes a rotating rod (331) and a support insertion hole (332) opened on the mounting base (30). The rotating rod (331) passes through the mounting base (30) and can be rotatably connected to the mounting base (30). The end position of the rotating rod (331) is fixedly connected to the mounting plate (40). The end of the rotating rod (331) is fixedly connected to a limit block (333). One side of the limit block (333) is threadedly connected to a support bolt (334) corresponding to the position of the support insertion hole (332). The support bolt (334) is threadedly connected to the support insertion hole (332).

9. A positioning fixture for a coordinate measuring machine according to claim 8, characterized in that: The base (10) includes a frame (11) and a support mesh plate (12) mounted on the frame (11). The locking thread rod (31) is inserted into the mesh opening on the support mesh plate (12). The maximum diameter of the locking thread rod (31) is adapted to the diameter of the mesh opening on the support mesh plate (12).

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