A high-precision three-coordinate measuring machine clamping tool assembly

Abstract

The utility model discloses a kind of clamping tooling components for high-precision three-coordinate measuring machine, including workbench, the upper surface of the workbench is provided with the backing plate for bearing the measured piece, the both sides of workbench are provided with clamping assembly, the below of workbench is provided with the drive mechanism for driving two clamping assemblies to be close to each other, drive mechanism is installed in the inside of movable seat, the below of workbench is provided with the slide rail for limiting the moving direction of movable seat, and the guide pillar for lifting workbench, the utility model is adjusted by first adjusting backing plate to be horizontal state, then measured piece is placed on backing plate, and according to the structure of measured piece, adjust movable seat to suitable position, finally control two clamping assemblies to be close to each other to two top blocks respectively with the both sides of measured piece contact, to stabilize the position of measured piece, avoid the measured piece position deviation when subsequent measurement, lead to the case of measurement result error.

Description

Technical Field

[0001] This utility model relates to the field of fixtures for coordinate measuring machines, and in particular to a clamping tooling assembly for a high-precision coordinate measuring machine. Background Technology

[0002] A coordinate measuring machine (CMM) moves its probe in three-dimensional space to collect coordinate data of points on the workpiece surface, either through contact or non-contact methods. The software then calculates parameters such as the workpiece's dimensions, shape, and positional tolerances. The application of specialized clamping fixtures is crucial during the measurement process. Since slight vibrations or offsets of the workpiece can cause data distortion, the fixtures eliminate clamping errors through rigid fixation and precise positioning, ensuring that the measurement results reflect the true machining state.

[0003] Chinese patent CN215572782U discloses a workpiece clamping device for coordinate measuring machine. By setting an upper opening slot, a compression slot, a control hole, a compression spring, a locking post, a pull-out post, a lower connecting plate, and a locking hole, the device can easily disassemble the second connecting plate, thus achieving the effect of quick maintenance of the second connecting plate.

[0004] In the above solution, the position of the part to be measured is fixed by bringing two foam blocks close to each other. However, for some parts to be measured, such as L-shaped, h-shaped or S-shaped parts, due to their complex structure, it is difficult for the two clamping plates to ensure that they are in a stable state. The irregular shape of the part to be measured is difficult to stabilize, which leads to the problem that the measurement results are prone to deviation. To solve this problem, a high-precision coordinate measuring machine clamping fixture assembly is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a clamping fixture assembly for a high-precision coordinate measuring machine, so as to solve the problem mentioned in the background art that irregularly shaped measuring parts are difficult to stabilize, which leads to deviations in the measurement results. The technical solution of this utility model provides a solution that is significantly different from the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A clamping fixture assembly for a high-precision coordinate measuring machine includes a worktable, a pad for supporting the workpiece to be measured is provided on the top of the worktable, clamping assemblies are provided on both sides of the worktable, a drive mechanism for driving the two clamping assemblies to move closer to each other is provided below the worktable, the drive mechanism is installed inside the movable seat, a slide rail for limiting the movement direction of the movable seat and a guide post for raising the worktable are provided below the worktable.

[0008] Preferably, at least four guide posts are provided, with the four guide posts located at the four corners of the square workbench. Each of the four guide posts has a threaded post inside, which is threadedly connected to the guide post. A pad is provided at the lower end of the threaded post.

[0009] Preferably, each clamping assembly includes a support column, a vertical column, a positioning cylinder, and a long rod. The vertical column is a hollow cuboid structure with an open upper end. A second slider is provided at the lower end of the vertical column. The driving mechanism is a bidirectional lead screw. The second slider is threadedly connected to the bidirectional lead screw. A turntable is provided at one end of the bidirectional lead screw. A first slider is provided in the middle of the bidirectional lead screw. The lower part of the first slider is connected to a bearing in the unthreaded area in the middle of the bidirectional lead screw. The first slider is installed inside the slide rail.

[0010] Preferably, the support column is located inside the column, the support column has a first positioning hole inside, the column has a second positioning hole on its side, the pin is located inside the first and second positioning holes, the upper end of the support column has a sleeve, the long rod is located inside the sleeve, the positioning cylinder is located outside the sleeve, and the positioning cylinder is threadedly connected to the sleeve.

[0011] Preferably, the sleeve has three spring pieces at its front end, a stop block at the front end of each spring piece, a pressure ring at the front end of the positioning cylinder, the contact surface between the pressure ring and the stop block is an inclined surface, and the surface of the long rod is made of anti-slip rubber material.

[0012] Preferably, a top block and a pressing assembly are respectively installed at both ends of the two long rods. The top block is connected to the long rod through a threaded post. The pressing assembly includes an extension plate, a pressing rod, and a pressing block. The extension plate has an L-shaped structure. One end of the extension plate is connected to the long rod through a threaded post, and the other end of the extension plate is threadedly connected to the pressing rod. The pressing block is connected to the lower end of the pressing rod and is made of rubber.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention involves mounting a set of clamping components on a movable base. Each set of clamping components consists of two symmetrically arranged clamping components. When using the coordinate measuring machine, the extension length of the threaded column among the four guide pillars is first adjusted until the pad is horizontal. Then, the workpiece to be measured is placed on the pad, and the movable base is adjusted to a suitable position according to the structure of the workpiece. Finally, the bidirectional lead screw is rotated via a turntable, causing the two clamping components to move closer together until the two top blocks contact both sides of the workpiece, thus stabilizing its position. For workpieces that are wide at one end and narrow and long at the other, the two sets of clamping components can be used to limit the workpiece's position. Simultaneously, the position of the long rod in the clamping components can be adjusted so that when the two clamping components move closer together, the extension distance of the two top blocks can match the width of the workpiece, preventing one top block from contacting the workpiece while the other cannot, thus improving applicability. Attached Figure Description

[0015] Figure 1 A schematic diagram of the main structure of a clamping fixture assembly for a high-precision coordinate measuring machine;

[0016] Figure 2 A schematic diagram of the guide post in a clamping fixture assembly for a high-precision coordinate measuring machine;

[0017] Figure 3 This is a schematic diagram of the clamping component in a high-precision coordinate measuring machine clamping fixture assembly.

[0018] Figure 4 A schematic diagram of the support column in a clamping fixture assembly for a high-precision coordinate measuring machine;

[0019] Figure 5 This is a schematic diagram of the pressing component in the clamping fixture assembly for a high-precision coordinate measuring machine.

[0020] In the diagram: 1. Workbench; 101. Pad; 102. Slide rail; 103. Guide post; 104. Pad block; 2. Movable seat; 201. Two-way lead screw; 202. Turntable; 203. First slider; 3. Clamping assembly; 4. Support column; 401. First positioning hole; 402. Sleeve; 403. Spring piece; 404. Stop block; 5. Column; 501. Second positioning hole; 502. Second slider; 503. Pin; 6. Positioning cylinder; 601. Pressure ring; 7. Long rod; 8. Top block; 9. Pressing assembly; 901. Extension plate; 902. Pressing rod; 903. Pressure block. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 In this utility model, a clamping fixture assembly for a high-precision coordinate measuring machine includes a worktable 1. A pad 101 for supporting the workpiece to be measured is provided on the top of the worktable 1. The size of the pad 101 can be arbitrarily selected according to the measurement space required by the workpiece. Clamping components 3 are provided on both sides of the worktable 1. A movable seat 2 is provided below the worktable 1. A two-way lead screw 201 is provided inside the movable seat 2. The two ends of the two-way lead screw 201 are respectively provided with a left-hand threaded wall and a right-hand threaded wall. A slide rail 102 and guide posts 103 are provided below the worktable 1. At least four guide posts 103 are provided. The four guide posts 103 are located at the four corners of the square worktable 1. Each of the four guide posts 103 is provided with a threaded post inside. The threaded post is threadedly connected to the guide post 103. A pad block 104 is provided at the lower end of the threaded post.

[0025] Two opposing clamping components 3 form a group. Each clamping component 3 includes a support column 4, a column 5, a positioning cylinder 6, and a long rod 7. One end of the long rod 7 is connected to the top block 8 via a threaded post. The column 5 is a hollow cuboid structure with an open upper end. A second slider 502 is provided at the lower end of the column 5. In a group of clamping components 3, one second slider 502 is connected to the left-hand threaded wall of the bidirectional lead screw 201, and the other second slider 502 is connected to the right-hand threaded wall of the bidirectional lead screw 201. A turntable 202 is provided at one end of the bidirectional lead screw 201, and a first slider 203 is provided in the middle of the bidirectional lead screw 201. The lower part of the first slider 203 is connected to the bearing in the unthreaded area in the middle of the bidirectional lead screw 201. The first slider 203 is installed inside the slide rail 102.

[0026] Example 1: Please refer to Figure 1-5 In this embodiment of the present invention, a clamping fixture assembly for a high-precision coordinate measuring machine includes a support column 4 located inside a column 5. The support column 4 has a first positioning hole 401 inside, and a second positioning hole 501 on the side of the column 5. A pin 503 is located inside the first and second positioning holes 401. A sleeve 402 is located at the upper end of the support column 4. A long rod 7 is located inside the sleeve 402, and a positioning cylinder 6 is located outside the sleeve 402. The positioning cylinder 6 is threadedly connected to the sleeve 402. By raising the position of the support column 4 inside the column 5 and then inserting the pin 503 into the first and second positioning holes 401, the height of the long rod 7 can be changed, thereby meeting the subsequent requirements for clamping workpieces of different heights.

[0027] The front end of the sleeve 402 is provided with three spring pieces 403, and the front end of the spring pieces 403 is provided with a stop block 404. The front end of the positioning cylinder 6 is provided with a pressure ring 601. The contact surface between the pressure ring 601 and the stop block 404 is an inclined surface. The surface of the long rod 7 is made of non-slip rubber. After adjusting the position of the long rod 7, rotating the positioning cylinder 6 can control the positioning cylinder 6 to move forward, so that the pressure ring 601 presses the three stop blocks 404 and moves them towards the central axis of the long rod 7 at the same time. In this way, the position of the long rod 7 can be fixed by increasing the friction.

[0028] When using the coordinate measuring machine, first adjust the extension length of the threaded column among the four guide columns 103 until the pad 101 is horizontal. Then, place the workpiece to be measured on the pad 101 and adjust the movable seat 2 to a suitable position according to the structure of the workpiece. Finally, control the rotation of the bidirectional lead screw 201 through the turntable 202, so that the two clamping components 3 move closer to each other until the two top blocks 8 contact the two sides of the workpiece, thereby stabilizing the position of the workpiece. When the workpiece is wide at one end and narrow and long at the other end, the position of the workpiece can be limited by two sets of clamping components 3. At the same time, the position of the long rod 7 in the clamping component 3 can be adjusted so that when the two clamping components 3 move closer to each other, the extension distance of the two top blocks 8 can be adapted to the width of the workpiece, avoiding the situation where one top block 8 contacts the workpiece while the other top block 8 cannot contact it. This can meet the measurement needs of workpieces of different sizes and improve applicability.

[0029] Example 2: Please refer to Figure 1-5 The difference from Embodiment 1 is that a pressing component 9 is installed at one end of the long rod 7. The pressing component 9 includes an extension plate 901, a pressing rod 902, and a pressing block 903. The extension plate 901 has an L-shaped structure. One end of the extension plate 901 is connected to the long rod 7 through a threaded post. The other end of the extension plate 901 is threadedly connected to the pressing rod 902. The pressing block 903 is connected to the lower end of the pressing rod 902 and is made of rubber.

[0030] When measuring a relatively flat part, the pressing component 9 can be installed at one end of the long rod 7. Then, the clamping component 3 is positioned so that the pressing component 9 is above the part to be measured. The height of the long rod 7 is then adjusted to a suitable position. Finally, the pressing rod 902 is rotated so that the pressure block 903 contacts the part to be measured, thereby fixing the position of the part to be measured and facilitating subsequent dimensional measurement.

[0031] The working principle of this utility model is as follows: By grouping two opposing clamping components 3 together, and movably mounting one set of clamping components 3 on the movable seat 2, when using the coordinate measuring machine, first adjust the pad 101 to a horizontal state, then place the workpiece to be measured on the pad 101, and adjust the movable seat 2 to a suitable position according to the structure of the workpiece to be measured. Finally, control the rotation of the bidirectional lead screw 201 through the turntable 202, so that the two clamping components 3 move closer to each other until the two top blocks 8 respectively contact the two sides of the workpiece to be measured, thereby stabilizing the position of the workpiece to be measured and avoiding the situation where the position of the workpiece to be measured shifts during subsequent measurement, resulting in incorrect measurement results.

[0032] 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.

[0033] 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 high-precision three-coordinate measuring machine clamping tool assembly, comprising a workbench (1), characterized in that: The upper surface of the workbench (1) is provided with a base plate (101) for carrying the measured parts, both sides of the workbench (1) are provided with clamping assemblies (3), the lower part of the workbench (1) is provided with a driving mechanism for driving the two clamping assemblies (3) to move close to each other, the driving mechanism is installed in the inside of the movable seat (2), the lower surface of the workbench (1) is provided with a slide rail (102) for limiting the moving direction of the movable seat (2), and a guide column (103) for lifting the workbench (1).

2. The high-precision three-coordinate measuring machine clamping tool assembly according to claim 1, characterized in that: The guide column (103) is provided with at least four, four guide columns (103) are respectively located at the four corners of the square workbench (1), the inside of the four guide columns (103) is provided with a threaded column, the threaded column is threadedly connected with the guide column (103), and the lower end of the threaded column is provided with a pad (104).

3. The high-precision three-coordinate measuring machine clamping tool assembly according to claim 1, characterized in that: The single clamping assembly (3) comprises a supporting column (4), a vertical column (5), a positioning cylinder (6) and a long rod (7), the vertical column (5) is a hollow cuboid structure with an open upper end, the lower end of the vertical column (5) is provided with a second sliding block (502), the driving mechanism is a bidirectional screw rod (201), the second sliding block (502) is threadedly connected with the bidirectional screw rod (201), one end of the bidirectional screw rod (201) is provided with a rotating disc (202), the middle part of the bidirectional screw rod (201) is provided with a first sliding block (203), the lower surface of the first sliding block (203) is bearing-connected with the middle part of the bidirectional screw rod (201) without a threaded area, and the first sliding block (203) is installed in the inside of the slide rail (102).

4. The high-precision three-coordinate measuring machine clamping tool assembly according to claim 3, characterized in that: The supporting column (4) is located in the inside of the vertical column (5), the inside of the supporting column (4) is provided with a first positioning hole (401), the side surface of the vertical column (5) is provided with a second positioning hole (501), a bolt (503) is located in the inside of the first positioning hole (401) and the second positioning hole (501), the upper end of the supporting column (4) is provided with a sleeve (402), the long rod (7) is located in the inside of the sleeve (402), the positioning cylinder (6) is located outside the sleeve (402), and the positioning cylinder (6) is threadedly connected with the sleeve (402).

5. The high-precision three-coordinate measuring machine clamping tool assembly according to claim 4, characterized in that: The front end of the sleeve (402) is provided with three elastic sheets (403), the front end of the elastic sheet (403) is provided with a stop block (404), the front end of the positioning cylinder (6) is provided with a pressing ring (601), the contact surface of the pressing ring (601) and the stop block (404) is an inclined surface, and the surface of the long rod (7) is made of anti-skid rubber material.

6. The high-precision three-coordinate measuring machine clamping tool assembly according to claim 5, characterized in that: Both ends of the two long rods (7) are respectively provided with a top block (8) and a pressing assembly (9), the top block (8) is connected with the long rod (7) through a threaded column, the pressing assembly (9) comprises an outward extending plate (901), a pressing rod (902) and a pressing block (903), the outward extending plate (901) is an L-shaped structure, one end of the outward extending plate (901) is connected with the long rod (7) through a threaded column, the other end of the outward extending plate (901) is threadedly connected with the pressing rod (902), the pressing block (903) is connected with the lower end of the pressing rod (902), and the pressing block (903) is made of rubber material.

Images