Coordinate Measuring Machine Multimodal Measurement System and Method

Abstract

This application belongs to the field of three-coordinate measurement technology, and specifically discloses a multi-modal measurement system and method for a three-coordinate measuring machine. Among them, the system includes a power box, and a measurement platform is arranged on the top of the power box; a gantry, the gantry includes two vertical support rods and a horizontally arranged lead screw, both ends of the lead screw are fixedly connected to the support rods, and a Y-axis slider is arranged at one end of the support rod away from the lead screw, and the Y-axis slider is slidably connected to the Y-axis chute; an X-axis slider is arranged on the lead screw, and the X-axis slider is slidably connected to the lead screw; a Z-axis driving cylinder is arranged at the bottom of the X-axis slider, a detection base is arranged at the output end of the Z-axis driving cylinder, a probe is arranged at the bottom of the detection base, and a detection head is arranged at the end of the probe. In this application, three probes are arranged at the bottom of the detection base, which can measure the same surface simultaneously and can quickly model in the three-coordinate software system, improving the measurement rate.

Description

Technical Field

[0001] The present application relates to a multi-modal measurement system and method for a coordinate measuring machine, belonging to the technical field of coordinate measurement technology. Background Art

[0002] With the development of industrial technology, the manufacturing of workpieces is becoming more and more automated, and the manufacturing speed and efficiency are getting higher and higher. In order to better meet the production requirements, final quality inspection is carried out on the workpieces. When the existing measurement system is used for measurement, the operation is cumbersome, and when measuring workpieces with protrusions inside and outside, the dimensional parameters cannot be accurately obtained. Summary of the Invention

[0003] According to one aspect of the present application, a multi-modal measurement system for a coordinate measuring machine is provided, including:

[0004] A power box, on the top of the power box is provided a measurement platform, at the center position of the upper surface of the measurement platform is provided a rotating platform, and Y-axis chutes are provided on both sides of the measurement platform;

[0005] A gantry, the gantry includes two vertical support rods and a horizontally arranged lead screw, the two ends of the lead screw are fixedly connected to the support rods, and at the end of the support rod away from the lead screw is provided a Y-axis slider, and the Y-axis slider is slidably connected to the Y-axis chute;

[0006] An X-axis slider is provided on the lead screw, and the X-axis slider is slidably connected to the lead screw;

[0007] At the bottom of the X-axis slider is provided a Z-axis driving cylinder, at the output end of the Z-axis driving cylinder is provided a detection base, at the bottom of the detection base is provided a probe, and at the end of the probe is provided a detection head;

[0008] The probe at least includes a first probe, a second probe and a third probe, and the first probe, the second probe and the third probe are evenly distributed at the bottom of the detection base;

[0009] Inside the power box are provided a first driving device and a second driving device, which are respectively used to drive the rotating platform and the Y-axis slider.

[0010] A further solution is that three chutes are provided at the bottom of the detection base, at the top of each of the first probe, the second probe and the third probe is provided a probe slider, the probe slider is slidably connected to the chute, and on the side wall of the detection base are provided three probe cylinders for driving the probe slider;

[0011] The included angle between adjacent chutes is 120°, and the positions of the three probe cylinders are adapted to the three chutes;

[0012] A scanning probe is provided at the center of the bottom of the detection base.

[0013] In a further solution, bidirectional detection rods are respectively provided at the bottoms of the first probe, the second probe, and the third probe, and detection heads are provided at both ends of the bidirectional detection rods.

[0014] In a further solution, a groove is formed along the length direction at the top of the bidirectional detection rod, a fixing rod is fixedly arranged in the groove, the fixing rod penetrates through the probe and is slidably connected with the probe;

[0015] A spring is sleeved on the fixing rod, the spring is located on both sides of the probe, one end of the spring is fixedly connected with the side wall of the groove, and the other end is fixedly connected with the probe.

[0016] In a further solution, the first probe, the second probe, and the third probe are respectively located on the vertical bisectors of the three bidirectional detection rods.

[0017] In a further solution, a calibration point is provided at the center of the rotating platform. When the detection base is located at the coordinate origin, the scanning probe and the calibration point are on the same vertical line.

[0018] According to another aspect of the present application, a multi-modal measurement method for a three-coordinate measuring machine is provided. The method applies the above multi-modal measurement system; it includes:

[0019] Adjust the positions of the gantry and the X-axis slider. The Z-axis driving cylinder is in a contracted state, so that the position of the scanning probe is at the coordinate origin position in the three-coordinate software system. At this time, the scanning probe and the calibration point are on the same vertical line;

[0020] Place the workpiece on the rotating platform. By adjusting the probe cylinder and the Z-axis driving cylinder, the detection head is placed on the inner wall of the workpiece. Start the first driving device to control the rotation of the workpiece and obtain the internal parameters of the workpiece;

[0021] Adjust the probe cylinder and the Z-axis driving cylinder again so that the detection head is placed on the outer wall of the workpiece to obtain the external parameters of the workpiece.

[0022] In a further solution, when measuring the inner wall of the workpiece, adjust the probe cylinder and the Z-axis driving cylinder so that the outer detection head of the bidirectional detection rod abuts against the inner wall of the workpiece. Start the first driving device to control the rotation of the workpiece. When there is a protrusion inside the workpiece, the bidirectional detection rod slides towards the direction close to the axis of the detection base under the action of the spring, and the internal parameters of the workpiece are obtained.

[0023] A further solution is that when measuring the outer wall of the workpiece, adjust the probe cylinder and the Z-axis drive cylinder so that the inner probe head of the bidirectional probe rod abuts against the outer wall of the workpiece. Start the first drive device to control the rotation of the workpiece. When there is a protrusion on the outside of the workpiece, under the action of the spring, the bidirectional probe rod slides away from the axis of the probe base, and the external parameters of the workpiece are obtained.

[0024] The beneficial effects that can be produced by this application include:

[0025] 1. This application is provided with three probes at the bottom of the probe base, which can measure the same curved surface simultaneously, and can quickly model in the three-coordinate software system, improving the measurement speed.

[0026] 2. This application is provided with a bidirectional probe rod at the bottom of the probe, which is used to quickly measure the internal and external parameters of the workpiece. For workpieces with irregular shapes, such as when there are protrusions on the inner wall or outer wall, the spring can be used to make the bidirectional probe rod slide relative to the probe, and it can automatically return to its position, improving the measurement speed and accuracy of special-shaped workpieces. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the measurement system of this application;

[0028] Figure 2 It is a schematic structural diagram of the probe base;

[0029] Figure 3 It is a schematic diagram of the installation position of the bidirectional probe rod;

[0030] Figure 4 It is a schematic structural diagram of the bidirectional probe rod;

[0031] Figure 5 It is a schematic diagram of the internal measurement state of the workpiece;

[0032] Figure 6 It is a schematic diagram of the external measurement state of the workpiece;

[0033] In the figure: 1. Power box; 2. Measurement platform; 3. Rotating platform; 4. Gantry; 5. Lead screw; 6. Z-axis drive cylinder; 7. X-axis slider; 8. Probe base; 9. Probe; 9.1. First probe; 9.2. Second probe; 9.3. Third probe; 10. Y-axis chute; 11. Scanning probe; 12. Bidirectional probe rod; 13. Workpiece; 14. Probe cylinder; 15. Groove; 16. Spring. Specific Embodiments

[0034] In order to make the purpose, technical solution, design method and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0035] As Figure 1 shown, in the first aspect of the present invention, a multi-modal measurement system for a coordinate measuring machine is provided for measuring a shaft workpiece 13, including:

[0036] A power box 1, on the top of the power box 1, a measurement platform 2 is provided, at the center position of the upper surface of the measurement platform 2, a rotating platform 3 is provided, and Y-axis chutes 10 are opened on both sides of the measurement platform 2; the power box 1 provides power for the Y-axis direction of the measurement system and also provides power for the rotating platform 3; a gantry 4, the gantry 4 includes two vertical support rods and a horizontally arranged lead screw 5, both ends of the lead screw 5 are fixedly connected to the support rods, at one end of the support rod away from the lead screw 5, a Y-axis slider is provided, and the Y-axis slider is slidably connected to the Y-axis chute 10; an X-axis slider 7 is provided on the lead screw 5, and the X-axis slider 7 is slidably connected to the lead screw 5; at the bottom of the X-axis slider 7, a Z-axis driving cylinder 6 is provided, at the output end of the Z-axis driving cylinder 6, a detection base 8 is provided, at the bottom of the detection base 8, a probe 9 is provided, and at the end of the probe 9, a detection head is provided; As Figure 2 shown, the probe 9 at least includes a first probe 9.1, a second probe 9.2 and a third probe 9.3, and the first probe 9.1, the second probe 9.2 and the third probe 9.3 are evenly distributed at the bottom of the detection base 8; inside the power box 1, a first driving device and a second driving device are provided, which are respectively used to drive the rotating platform 3 and the Y-axis slider.

[0037] Continue to refer to Figure 2 , three chutes are opened at the bottom of the detection base 8, at the top of the first probe 9.1, the second probe 9.2 and the third probe 9.3, probe sliders are provided, and the probe sliders are slidably connected to the chutes, on the side wall of the detection base 8, three probe cylinders 14 are provided for driving the probe sliders; the included angle between adjacent chutes is 120°, and the positions of the three probe cylinders 14 are adapted to the three chutes; at the center position of the bottom of the detection base 8, a scanning probe 11 is provided.

[0038] As Figure 3 and Figure 4As shown, bidirectional detection rods 12 are respectively arranged at the bottom ends of the first probe 9.1, the second probe 9.2 and the third probe 9.3. Detection heads are arranged at both ends of the bidirectional detection rod 12. A groove 15 is formed in the top of the bidirectional detection rod 12 along the length direction. A fixing rod is fixedly arranged in the groove 15. The fixing rod penetrates through the probe 9 and is slidably connected with the probe 9. A spring 16 is sleeved on the fixing rod. The spring 16 is located on both sides of the probe 9. One end of the spring 16 is fixedly connected with the side wall of the groove 15, and the other end of the spring 16 is fixedly connected with the probe 9. The first probe 9.1, the second probe 9.2 and the third probe 9.3 are respectively located on the vertical bisectors of the three bidirectional detection rods 12.

[0039] For the convenience of calibration, a calibration point is arranged at the center position of the rotating platform 3. When the detection base 8 is located at the coordinate origin, the scanning probe 11 and the calibration point are on the same vertical line.

[0040] The present invention also provides a multi-modal measurement method for a three-coordinate measuring machine. The method applies the above multi-modal measurement system and includes:

[0041] Adjust the positions of the gantry 4 and the X-axis slider 7. The Z-axis driving cylinder 6 is in a contracted state, so that the position of the scanning probe 11 is at the coordinate origin position in the three-coordinate software system. At this time, the scanning probe 11 and the calibration point are on the same vertical line. Among them, the position of the gantry 4 is driven by the Y-axis slider. The Y-axis slider slides in the Y-axis chute 10 and is realized by the second driving device. Since driving the gantry 4 to slide in the Y-axis chute 10 belongs to the prior art, the specific sliding process of the Y-axis slider and the Y-axis chute 10 is not limited in this application. The position of the X-axis slider 7 can be realized by the relative rotation of the X-axis slider 7 and the lead screw 5. For example, a driving motor and a nut matching the lead screw 5 are arranged inside the slider. The driving motor drives the nut to rotate on the lead screw, and then drives the X-axis slider 7 to slide relative to the lead screw 5.

[0042] Place the workpiece on the rotating platform 3. By adjusting the probe cylinder 14 and the Z-axis driving cylinder 6, the detection head is placed on the inner wall of the workpiece. Start the first driving device to control the rotation of the workpiece and obtain the internal parameters of the workpiece.

[0043] Adjust the probe cylinder 14 and the Z-axis driving cylinder 6 again so that the detection head is placed on the outer wall of the workpiece to obtain the external parameters of the workpiece.

[0044] As Figure 5As shown, when measuring the inner wall of the workpiece, adjust the probe cylinder 14 and the Z-axis drive cylinder 6 so that the outer probe head of the bidirectional probe rod 12 abuts against the inner wall of the workpiece. Start the first driving device to control the rotation of the workpiece. When there is a protrusion inside the workpiece, under the action of the spring 16, the bidirectional probe rod 12 slides in the direction close to the axis of the probe base 8 to obtain the internal parameters of the workpiece.

[0045] As Figure 6 shown, when measuring the outer wall of the workpiece, adjust the probe cylinder 14 and the Z-axis drive cylinder 6 so that the inner probe head of the bidirectional probe rod 12 abuts against the outer wall of the workpiece. Start the first driving device to control the rotation of the workpiece. When there is a protrusion outside the workpiece, under the action of the spring 16, the bidirectional probe rod 12 slides in the direction away from the axis of the probe base 8 to obtain the external parameters of the workpiece.

[0046] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary technicians in the technical field to understand the disclosed embodiments.

Claims

1. The multi-modal measurement system of a three-dimensional coordinate measuring machine is characterized by: include: A power box, wherein a measuring platform is arranged on the top of the power box, a rotating platform is arranged at the center of the upper surface of the measuring platform, and Y-axis slide grooves are arranged on both sides of the measuring platform; A gantry, the gantry comprising two vertical support rods and a horizontally arranged lead screw, both ends of the lead screw being fixedly connected to the support rods, one end of the support rod away from the lead screw being provided with a Y-axis slider, the Y-axis slider being slidably connected to the Y-axis slide groove; The lead screw is provided with an X-axis slider, and the X-axis slider is slidably connected to the lead screw; A Z-axis driving cylinder is arranged at the bottom of the X-axis slider, a detection base is arranged at the output end of the Z-axis driving cylinder, a probe is arranged at the bottom of the detection base, a detection head is arranged at the end of the probe, and a scanning probe is arranged at the bottom center of the detection base; The probes at least include a first probe, a second probe and a third probe, and the first probe, the second probe and the third probe are evenly distributed at the bottom of the detection base; The power box is provided with a first driving device and a second driving device, which are used to drive the rotating platform and the Y-axis slider respectively; The bottom of the detection base is provided with three slide grooves, the tops of the first probe, the second probe and the third probe are all provided with probe sliders, the probe sliders are slidably connected with the slide grooves, and the side walls of the detection base are provided with three probe cylinders for driving the probe sliders; The angle between adjacent chutes is 120°, and the positions of the three probe cylinders are adapted to the three chutes; The bottom ends of the first probe, the second probe and the third probe are respectively provided with bidirectional detection rods, and both ends of the bidirectional detection rods are provided with detection heads; A groove is formed at the top of the bidirectional detection rod along the length direction, a fixing rod is fixedly arranged in the groove, the fixing rod passes through the probe and is slidably connected to the probe; A spring is sleeved on the fixed rod, and the spring is located on both sides of the probe, one end of the spring is fixedly connected to the side wall of the groove, and the other end is fixedly connected to the probe. Based on the spring, the two-way detection rod and the probe slide relative to each other, which is used to measure irregular workpieces with protrusions on the inner wall or the outer wall. When measuring the outer wall of the workpiece, the probe cylinder and the Z-axis drive cylinder are adjusted so that the internal detection head of the two-way detection rod abuts against the outer wall of the workpiece, and the first driving device is started to control the rotation of the workpiece. When there is a protrusion on the outside of the workpiece, the two-way detection rod 12 slides away from the axis of the detection base 8 under the action of the spring to obtain the external parameters of the workpiece. When there is a protrusion inside the workpiece, the two-way detection rod 12 slides toward the axis of the detection base 8 under the action of the spring 16 to obtain the internal parameters of the workpiece.

2. The multi-modal measurement system of a three-dimensional coordinate measuring machine according to claim 1, characterized in that: The first probe, the second probe and the third probe are respectively located on the perpendicular midlines of the three bidirectional detection rods.

3. The multimodal measurement system of a three-dimensional coordinate measuring machine according to claim 2, characterized in that: A calibration point is arranged at the center of the rotating platform, and when the detection base is located at the origin of coordinates, the scanning probe and the calibration point are on the same vertical line.

4. A multimodal measurement method of a three-dimensional coordinate measuring machine, characterized in that: The method adopts the three-coordinate measuring machine multimodal measurement system according to claim 3; comprising: Adjust the positions of the gantry and the X-axis slider, and the Z-axis drive cylinder is in a retracted state, so that the position of the scanning probe is at the coordinate origin in the three-coordinate software system, and the scanning probe is on the same vertical line as the calibration point; The workpiece is placed on the rotating platform, the Z-axis driving cylinder is adjusted so that the detection head is placed on the inner wall of the workpiece, the first driving device is started, the rotation of the workpiece is controlled, and the internal parameters of the workpiece are obtained; Adjust the probe cylinder and the Z-axis drive cylinder again so that the detection head is placed on the outer wall of the workpiece to obtain the external parameters of the workpiece.

5. The multimodal measurement method of a three-dimensional coordinate measuring machine according to claim 4, characterized in that: When measuring the inner wall of the workpiece, adjust the probe cylinder and the Z-axis drive cylinder so that the external detection head of the bidirectional detection rod abuts against the inner wall of the workpiece, start the first drive device, and control the rotation of the workpiece. When there is a protrusion inside the workpiece, the bidirectional detection rod slides toward the axis of the detection base under the action of the spring to obtain the internal parameters of the workpiece.

6. The multi-modal measurement method of a three-dimensional coordinate measuring machine according to claim 5, characterized in that: When measuring the outer wall of the workpiece, adjust the probe cylinder and the Z-axis drive cylinder so that the internal detection head of the two-way detection rod abuts against the outer wall of the workpiece, start the first drive device, and control the rotation of the workpiece. When there is a protrusion on the outside of the workpiece, the two-way detection rod slides away from the axis of the detection base under the action of the spring to obtain the external parameters of the workpiece.

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