Three-coordinate measuring device with automatic measuring function
The coordinate measuring machine with automatic measurement function solves the problems of workpiece displacement and material adaptability by using synchronous clamping and switchable measuring heads, and achieves stable and accurate measurement results and efficient inspection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-03-06
AI Technical Summary
Existing coordinate measuring machines (CMMs) are prone to workpiece displacement during measurement, leading to result deviations. Furthermore, the measuring head has a simple structure and cannot adapt to the measurement needs of workpieces made of different materials.
The coordinate measuring machine with automatic measurement function uses two clamping plates to simultaneously hold the workpiece, combined with switchable contact and non-contact measuring heads, and a material adaptation strategy to achieve stable measurement of workpieces of different materials.
It improves the consistency of measurement benchmarks and the authenticity of data, reduces workpiece displacement and deformation, is suitable for batch inspection of workpieces with mixed materials, and reduces equipment downtime.
Smart Images
Figure CN223976641U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of measuring instrument technology, and in particular to a coordinate measuring device with automatic measurement function. Background Technology
[0002] A coordinate measuring machine (CMM) is a precision measuring instrument used in basic engineering and technological sciences. It obtains the spatial coordinate values of the workpiece surface by moving along three mutually perpendicular guide rails and using a probe to contact the workpiece. After these coordinate values are processed by a computer, geometric information such as the size, shape, and position of the workpiece can be obtained.
[0003] Existing coordinate measuring machines (CMMs) include a worktable and a CMM mechanism. The CMM mechanism includes a mounting frame, a guide rod, a slider, and a measuring end. The mounting frame is mounted on the worktable and can move along the length of the worktable. The guide rod is mounted on the mounting frame and can move relative to the mounting frame along the width of the worktable. The slider is mounted on the guide rod and can move up and down relative to the guide rod in the height direction. The measuring end is mounted on the slider and is used to measure the workpiece on the worktable. The drawback is that, in use, the workpiece is usually placed directly on the measuring table, and the workpiece is prone to displacement during measurement, leading to result deviation. In addition, the measuring head has a single structure and cannot be switched to adapt to the measurement needs of workpieces of different materials. Therefore, a CMM with automatic measurement function is needed. Utility Model Content
[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a coordinate measuring device with automatic measurement function. This device can solve the problems that existing coordinate measuring devices usually place the workpiece directly on the measuring table, which can easily cause the workpiece to shift during measurement, resulting in deviations in the results. In addition, the measuring head has a single structure and cannot be switched to adapt to the measurement needs of workpieces of different materials.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a coordinate measuring device with automatic measurement function, comprising a device base plate and a workpiece positioning device. The workpiece positioning device includes a first motor, a first threaded rod, a workpiece positioning plate, a limiting plate, a mounting plate, an electric push rod, and a clamping plate. The first motor is fixedly connected to the surface of the device base plate. The first threaded rod is fixedly connected to the output end of the first motor and rotatably connected to the inside of the device base plate. The workpiece positioning plate is threaded onto the outer surface of the first threaded rod and slidably connected to the top of the device base plate. There are two limiting plates, both fixedly connected to the surface of the device base plate, located on both sides of the device base plate. The workpiece positioning plate is slidably connected to the limiting plate. There are two mounting plates, both fixedly connected to the top of the workpiece positioning plate. There are multiple electric push rods, all fixedly connected to the corresponding mounting plate surfaces. The number of clamping plates is the same as the number of mounting plates, all slidably connected to the top of the workpiece positioning plate. The clamping plate is fixedly connected to the output end of the electric push rod.
[0006] Preferably, a movable bracket is slidably connected to the surface of the base plate of the device, a second motor is fixedly connected to the surface of the movable bracket, a second threaded rod is fixedly connected to the output end of the second motor, the second threaded rod is rotatably connected to the top of the movable bracket, and a movable block is threadedly sleeved on the outer surface of the second threaded rod, and the movable block is slidably connected to the movable bracket.
[0007] Preferably, a hydraulic cylinder is fixedly connected to the surface of the movable block, a lifting block is fixedly connected to the output end of the hydraulic cylinder, and a measuring head is fixedly connected to the bottom of the lifting block.
[0008] Preferably, a third motor is fixedly connected to the surface of the movable support, and a gear is fixedly connected to the output end of the third motor.
[0009] Preferably, a toothed plate is fixedly connected to the surface of the device base plate, and a limit groove is formed on the surface of the device base plate, with the movable bracket slidably connected to the limit groove.
[0010] Preferably, the toothed plate is meshed with the gear, and the surface of the toothed plate is provided with tooth grooves that are adapted to the gear.
[0011] Preferably, there are two movable supports, both of which are slidably connected to the surface of the device base plate, and the structures on the two movable supports are exactly the same.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. This coordinate measuring machine with automatic measurement function achieves uniform force on the workpiece and clamping stability through the synchronous clamping action of two clamping plates, avoiding workpiece displacement or deformation caused by traditional unilateral force application, and improving the consistency of measurement reference. It adopts switchable contact and non-contact measuring heads, combined with a material adaptation strategy (such as contact probes for metals and non-contact laser scanning for rubber), to reduce deformation of soft materials caused by improper force application of the probes, ensuring the authenticity of measurement data. The contact and non-contact measuring heads symmetrically arranged on the two moving supports do not require manual replacement of the probe modules, reducing equipment downtime. It is suitable for batch inspection scenarios of workpieces with mixed materials. It solves the problems of existing coordinate measuring machines that usually place the workpiece directly on the measuring table, which can easily lead to workpiece displacement and result deviation during measurement, and the single measuring head structure that cannot be switched to adapt to the measurement needs of different workpiece materials. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0015] Figure 1 This is a schematic diagram of the main body of this utility model;
[0016] Figure 2 For the present utility model Figure 1 Schematic diagram at point A in the middle;
[0017] Figure 3 This is a schematic diagram of the movable support of this utility model;
[0018] Figure 4 This is a schematic diagram of the measuring head of this utility model;
[0019] Figure 5 This is a schematic diagram of the workpiece positioning plate of this utility model.
[0020] Reference numerals in the attached drawings: 1. Device base plate; 2. First motor; 3. First threaded rod; 4. Workpiece positioning plate; 5. Limiting plate; 6. Moving bracket; 7. Second motor; 8. Second threaded rod; 9. Moving block; 10. Hydraulic cylinder; 11. Lifting block; 12. Measuring head; 13. Third motor; 14. Gear; 15. Gear plate; 16. Gear groove; 17. Limiting groove; 18. Mounting plate; 19. Electric push rod; 20. Clamping plate. Detailed Implementation
[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0023] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.
[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0025] Please see Figure 1-5 This utility model provides a technical solution: a coordinate measuring device with automatic measurement function, including a device base plate 1 and a workpiece positioning device. The workpiece positioning device includes a first motor 2, a first threaded rod 3, a workpiece positioning plate 4, a limiting plate 5, a mounting plate 18, an electric push rod 19, and a clamping plate 20. The first motor 2 is fixedly connected to the surface of the device base plate 1, the first threaded rod 3 is fixedly connected to the output end of the first motor 2, and the first threaded rod 3 is rotatably connected to the inside of the device base plate 1. The workpiece positioning plate 4 is threadedly sleeved on the outer surface of the first threaded rod 3. Positioning plate 4 is slidably connected to the top of device base plate 1. There are two limiting plates 5, both of which are fixedly connected to the surface of device base plate 1. The limiting plates 5 are located on both sides of device base plate 1. Workpiece positioning plate 4 is slidably connected to limiting plate 5. There are two mounting plates 18, both of which are fixedly connected to the top of workpiece positioning plate 4. There are multiple electric push rods 19, all of which are fixedly connected to the surface of the corresponding mounting plate 18. The number of clamping plates 20 is the same as that of mounting plates 18, and they are all slidably connected to the top of workpiece positioning plate 4. The clamping plates 20 are fixedly connected to the output end of electric push rods 19.
[0026] Furthermore, a movable bracket 6 is slidably connected to the surface of the device base plate 1, a second motor 7 is fixedly connected to the surface of the movable bracket 6, a second threaded rod 8 is fixedly connected to the output end of the second motor 7, the second threaded rod 8 is rotatably connected to the top of the movable bracket 6, a movable block 9 is threadedly sleeved on the outer surface of the second threaded rod 8, the movable block 9 is slidably connected to the movable bracket 6, a hydraulic cylinder 10 is fixedly connected to the surface of the movable block 9, a lifting block 11 is fixedly connected to the output end of the hydraulic cylinder 10, a measuring head 12 is fixedly connected to the bottom of the lifting block 11, a third motor 13 is fixedly connected to the surface of the movable bracket 6, a gear 14 is fixedly connected to the output end of the third motor 13, a toothed plate 15 is fixedly connected to the surface of the device base plate 1, a limit groove 17 is opened on the surface of the device base plate 1, the movable bracket 6 is slidably connected to the limit groove 17, the toothed plate 15 is meshed with the gear 14, and a toothed groove 16 adapted to the gear 14 is opened on the surface of the toothed plate 15. There are two movable brackets 6, both of which are slidably connected to the surface of the device base plate 1, and the structures on the two movable brackets 6 are exactly the same.
[0027] Further, the workpiece is placed on top of the workpiece positioning plate 4, and the electric push rod 19 is activated to move the clamping plate 20. The two clamping plates 20 clamp the workpiece to fix it. Then, according to the workpiece material, different measuring heads 12 are used to perform coordinate measuring on the workpiece. Specifically, the third motor 13 is activated to drive the gear 14 to rotate. Since the gear 14 is meshed with the tooth groove 16 on the gear plate 15, the rotation of the gear 14 will cause the moving bracket 6 to slide on the surface of the device base plate 1. The X-axis direction of the measuring head 12 is adjusted, and the second motor 7 is activated to drive the second thread. Rotating rod 8 causes the moving block 9 to slide on top of the moving bracket 6, adjusting the Z-axis direction of the measuring head 12. The lifting block 11 is lowered by hydraulic cylinder 10 to adjust the Y-axis direction of the measuring head 12, thereby performing coordinate measuring on the workpiece. The moving bracket 6 is located on both sides of the device base plate 1. The two moving brackets 6 have the same structure. The two measuring heads 12 are contact and non-contact measuring heads (such as laser scanning and optical measuring heads). Different measuring heads 12 are selected according to the usage to adapt to the measurement needs of different materials (metal, plastic, rubber, etc.).
[0028] Furthermore, by synchronously clamping the two clamping plates 20, uniform force on the workpiece and clamping stability are achieved, avoiding workpiece displacement or deformation caused by traditional unilateral force application, and improving the consistency of measurement reference. The use of switchable contact and non-contact measuring heads 12, combined with a material adaptation strategy (such as contact measuring heads for metals and non-contact laser scanning for rubber), reduces the deformation of soft materials caused by improper force application by the measuring heads, ensuring the authenticity of measurement data. The contact and non-contact measuring heads 12 symmetrically arranged on the two moving supports 6 do not require manual replacement of the measuring head modules, reducing equipment downtime. It is suitable for batch inspection scenarios of workpieces with mixed materials, solving the problem that existing coordinate measuring devices usually place the workpiece directly on the measuring table, which easily leads to workpiece displacement and result deviation during measurement, and the measuring head structure is simple and cannot be switched to adapt to the measurement needs of workpieces with different materials.
[0029] Structural Description: Device Base Plate 1: A base for mounting various components and for placing and measuring workpieces;
[0030] First motor 2: Fixed to the surface of the device base plate 1, providing power for the rotation of the first threaded rod 3;
[0031] First threaded rod 3: fixedly connected to the output end of the first motor 2, driving the workpiece positioning plate 4 to move and thus change the measurement position of the workpiece;
[0032] Workpiece positioning plate 4: threadedly sleeved on the outer surface of the first threaded rod 3, serving as a reference plane for placing the workpiece, used to position and support the workpiece to be measured, ensuring that the workpiece is in a stable horizontal state during the measurement process;
[0033] Limiting plate 5: Fixed to the top of the device base plate 1, it restricts the movement of the workpiece positioning plate 4 and provides stability for the movement of the workpiece positioning plate 4.
[0034] The movable support 6 is slidably connected to the surface of the device base plate 1. There are two movable supports 6, which are symmetrically distributed on both sides of the device base plate 1. They move through gear transmission, support the measuring head 12 and transmit the power for X-axis adjustment.
[0035] The second motor 7 is fixed to the surface of the movable bracket 6, providing power for the rotation of the second threaded rod 8 and transmitting power for the adjustment of the Z-axis of the measuring head 12.
[0036] Second threaded rod 8: Fixed to the output end of second motor 7, used to drive moving block 9 to move;
[0037] Moving block 9: threadedly fitted onto the outer surface of the second threaded rod 8, used to move the measuring head 12;
[0038] Hydraulic cylinder 10: Fixed to the surface of moving block 9, driving lifting block 11 to descend, adjusting the Y-axis position of measuring head 12, and cooperating with second motor 7 and third motor 13 to complete the measurement of three-dimensional coordinates;
[0039] Lifting block 11: Fixed to the bottom of hydraulic cylinder 10, used to install measuring head 12;
[0040] Measuring head 12: Fixed to the bottom of lifting block 11, used to measure workpiece. There are two measuring heads 12, including a contact probe (suitable for rigid measurement of metal parts) and a non-contact probe (such as laser scanning, used for non-destructive testing of soft material surfaces such as plastic and rubber). The measurement compatibility is improved by material adaptive switching.
[0041] The third motor 13 is fixedly connected to the surface of the movable bracket 6 and is used to drive the gear 14 to rotate, thereby adjusting the position of the movable bracket 6 on the device base plate 1.
[0042] Gear 14: Fixed to the output end of the third motor 13, it works with the gear plate 15 and the tooth groove 16 to adjust the position of the moving bracket 6 and drive the moving bracket 6 to move.
[0043] Limiting groove 17: It is formed on the surface of the device base plate 1 to provide stability for the movement of the movable support 6;
[0044] Mounting plate 18: Fixed to the top of workpiece positioning plate 4, used for mounting various components;
[0045] Electric push rod 19: Fixed to the surface of mounting plate 18, driving two symmetrically distributed clamping plates 20 to move synchronously, realizing rapid clamping and release of workpieces and improving clamping efficiency;
[0046] Clamping plate 20: Fixed to the output end of electric push rod 19, the two clamping plates 20 apply force synchronously in opposite directions to avoid workpiece displacement or deformation caused by unilateral pressure, and ensure clamping uniformity and measurement reference stability.
[0047] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A coordinate measuring device with automatic measurement function, characterized in that, Include: Device base plate (1); Workpiece positioning device, the workpiece positioning device includes a first motor (2), a first threaded rod (3), a workpiece positioning plate (4), a limiting plate (5), a mounting plate (18), an electric push rod (19) and a clamping plate (20), the first motor (2) is fixedly connected on the surface of the device base plate (1), the first threaded rod (3) is fixedly connected on the output end of the first motor (2), the first threaded rod (3) is rotatably connected in the device base plate (1), the workpiece positioning plate (4) is threadedly sleeved on the outer surface of the first threaded rod (3), the workpiece positioning plate (4) is slidably connected on the top of the device base plate (1), the limiting plate (5) is two and is fixedly connected on the surface of the device base plate (1), the limiting plate (5) is located on both sides of the device base plate (1), the workpiece positioning plate (4) is slidably connected with the limiting plate (5), the mounting plate (18) is two and is fixedly connected on the top of the workpiece positioning plate (4), the electric push rod (19) is a plurality of and is fixedly connected on the surface of the corresponding mounting plate (18), the clamping plate (20) is the same as the mounting plate (18) and is slidably connected on the top of the workpiece positioning plate (4), the clamping plate (20) is fixedly connected with the output end of the electric push rod (19).
2. A three-dimensional measuring apparatus with automatic measuring function according to claim 1, characterized in that: The surface of the device base plate (1) is slidably connected with a moving support (6), the surface of the moving support (6) is fixedly connected with a second motor (7), the output end of the second motor (7) is fixedly connected with a second threaded rod (8), the second threaded rod (8) is rotatably connected on the top of the moving support (6), the moving block (9) is threadedly sleeved with a moving block (9) on the outer surface of the second threaded rod (8), and the moving block (9) is slidably connected with the moving support (6).
3. A three-coordinate measuring device with automatic measuring function according to claim 2, characterized in that: The surface of the moving block (9) is fixedly connected with a hydraulic cylinder (10), the output end of the hydraulic cylinder (10) is fixedly connected with a lifting block (11), and the bottom of the lifting block (11) is fixedly connected with a measuring head (12).
4. The apparatus according to claim 2, wherein: The surface of the moving support (6) is fixedly connected with a third motor (13), and the output end of the third motor (13) is fixedly connected with a gear (14).
5. A coordinate measuring device with automatic measurement function according to claim 1, characterized in that: The surface of the device base plate (1) is fixedly connected with a toothed plate (15), and the surface of the device base plate (1) is provided with a limiting groove (17), and the moving support (6) is slidably connected with the limiting groove (17).
6. A three-coordinate measuring device with automatic measuring function according to claim 5, characterized in that: The toothed plate (15) is meshingly connected with the gear (14), and the surface of the toothed plate (15) is provided with a gear groove (16) matched with the gear (14).
7. The apparatus of claim 2 wherein: the apparatus further comprises a probe for measuring the distance between the probe and the object. The number of the moving support (6) is two, and both are slidably connected on the surface of the device base plate (1), and the structures of the two moving supports (6) are exactly the same.