Multi-modal measurement system and method of three-coordinate measuring machine

Abstract

The invention belongs to the technical field of three-coordinate measurement, and particularly discloses a multi-modal measurement system and method of a three-coordinate measuring machine, and the system comprises a power box, and a measurement platform is arranged at the top of the power box; the portal frame comprises two vertical supporting rods and a horizontally-arranged lead screw, the two ends of the lead screw are fixedly connected with the supporting rods, Y-axis sliding blocks are arranged at the ends, away from the lead screw, of the supporting rods, and the Y-axis sliding blocks are in sliding connection with the Y-axis sliding grooves; an X-axis sliding block is arranged on the lead screw and connected with the lead screw in a sliding mode. A Z-axis driving air cylinder is arranged at the bottom of the X-axis sliding block, a detection base is arranged at the output end of the Z-axis driving air cylinder, a probe is arranged at the bottom of the detection base, and a detection head is arranged at the tail end of the probe. The three probes are arranged at the bottom of the detection base, the same curved surface can be measured at the same time, rapid modeling can be achieved in a three-coordinate software system, and the measurement rate is increased.

Description

Technical Field

[0001] The present application relates to a multi-modal measurement system and method for a three-coordinate measuring machine, and belongs to the technical field of three-coordinate measurement. 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, the workpieces will be subject to final quality inspection. The existing measurement system is cumbersome to operate, and it is impossible to accurately obtain the dimensional parameters when measuring workpieces with internal and external protrusions. Summary of the invention

[0003] According to one aspect of the present application, a three-coordinate measuring machine multimodal measurement system is provided, comprising: 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 disposed at the bottom of the X-axis slider, a detection base is disposed at the output end of the Z-axis driving cylinder, a probe is disposed at the bottom of the detection base, and a detection head is disposed at the end of the probe; 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 inside, which are used to drive the rotating platform and the Y-axis slider respectively.

[0004] A further solution is that three slide grooves are provided at the bottom of the detection base, probe sliders are provided on the tops of the first probe, the second probe and the third probe, the probe sliders are slidably connected with the slide grooves, and three probe cylinders are provided on the side walls of the detection base 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; A scanning probe is arranged at the center of the bottom of the detection base.

[0005] A further solution is that 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.

[0006] A further solution is that a groove is provided 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 fixing 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.

[0007] A further solution is that the first probe, the second probe and the third probe are respectively located on the perpendicular midlines of the three bidirectional detection rods.

[0008] A further solution is that a calibration point is provided at the center of the rotating platform, and when the detection base is located at the coordinate origin, the scanning probe and the calibration point are on the same vertical line.

[0009] According to another aspect of the present application, a multimodal measurement method of a three-dimensional coordinate measuring machine is provided, wherein the method applies the multimodal measurement system described above; the method comprises: 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, and the probe cylinder and the Z-axis driving cylinder are adjusted so that the detection head is placed on the inner wall of the workpiece, and the first driving device is started to control the rotation of the workpiece to obtain the internal parameters of the workpiece; 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.

[0010] A further solution is to adjust the probe cylinder and the Z-axis drive cylinder when measuring the inner wall of the workpiece 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.

[0011] A further solution is to adjust the probe cylinder and the Z-axis drive cylinder when measuring the outer wall of the workpiece so that the internal detection head of the bidirectional 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 bidirectional 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.

[0012] The beneficial effects of this application include: 1. This application has three probes at the bottom of the detection base, which can measure the same surface at the same time, and can be quickly modeled in the three-coordinate software system, thereby improving the measurement rate.

[0013] 2. The present application sets a bidirectional detection rod at the bottom of the probe for quickly measuring the internal and external parameters of the workpiece. For workpieces with irregular shapes, such as protrusions on the inner or outer wall, a spring can be used to make the bidirectional detection rod and the probe slide relative to each other and return to their original position automatically, thereby improving the measurement speed and accuracy of special-shaped workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the measurement system structure for this application; Figure 2 This is a schematic diagram of the detection base structure; Figure 3 This is a schematic diagram of the installation position of the bidirectional detection rod; Figure 4 It is a schematic diagram of the bidirectional detection rod structure; Figure 5 This is a schematic diagram of the internal measurement state of the workpiece; Figure 6 This is a schematic diagram of the external measurement state of the workpiece; In the figure: 1. power box; 2. measuring platform; 3. rotating platform; 4. gantry; 5. lead screw; 6. Z-axis driving cylinder; 7. X-axis slider; 8. detection base; 9. probe; 9.1. first probe; 9.2. second probe; 9.3. third probe; 10. Y-axis slide; 11. scanning probe; 12. bidirectional detection rod; 13. workpiece; 14. probe cylinder; 15. groove; 16. spring. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution, design method and advantages of the present invention clearer, the present invention is further described in detail by specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] like Figure 1 As shown, in a first aspect of the present invention, a three-coordinate measuring machine multimodal measurement system is provided, which is used to measure a shaft workpiece 13, comprising: A power box 1, a measuring platform 2 is arranged on the top of the power box 1, a rotating platform 3 is arranged at the center position of the upper surface of the measuring platform 2, and Y-axis slide grooves 10 are opened on both sides of the measuring platform 2; the power box 1 provides power for the Y-axis direction of the measuring 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, and the end of the support rod away from the lead screw 5 is provided with a Y-axis slider, and the Y-axis slider is slidably connected to the Y-axis slide groove 10; an X-axis slider 7 is arranged on the lead screw 5, and the X-axis slider 7 is slidably connected to the lead screw 5; a Z-axis driving cylinder 6 is arranged at the bottom of the X-axis slider 7, and a detection base 8 is arranged at the output end of the Z-axis driving cylinder 6, a probe 9 is arranged at the bottom of the detection base 8, and a detection head is arranged at the end of the probe 9; Figure 2 As shown, the probe 9 includes at least 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; the power box 1 is provided with a first driving device and a second driving device, which are respectively used to drive the rotating platform 3 and the Y-axis slider.

[0017] Continue to refer to Figure 2 Three slide grooves are provided at the bottom of the detection base 8, and probe sliders are provided on the tops of the first probe 9.1, the second probe 9.2 and the third probe 9.3, and the probe sliders are slidably connected with the slide grooves. Three probe cylinders 14 are provided on the side walls of the detection base 8 for driving the probe sliders; the angle between adjacent slide grooves is 120°, and the positions of the three probe cylinders 14 are adapted to the three slide grooves; a scanning probe 11 is provided at the bottom center of the detection base 8.

[0018] like Figure 3 and Figure 4 As shown, the bottom ends of the first probe 9.1, the second probe 9.2 and the third probe 9.3 are respectively provided with a two-way detection rod 12, and both ends of the two-way detection rod 12 are provided with a detection head, and the top of the two-way detection rod 12 is provided with a groove 15 along the length direction, and a fixing rod is fixedly provided in the groove 15, and the fixing rod passes through the probe 9 and is slidably connected with the probe 9; a spring 16 is sleeved on the fixing rod, and the spring 16 is located on both sides of the probe 9, one end of the spring 16 is fixedly connected to the side wall of the groove 15, and the other end of the spring 16 is fixedly connected to the probe 9. The first probe 9.1, the second probe 9.2 and the third probe 9.3 are respectively located on the perpendicular midlines of the three two-way detection rods 12.

[0019] In order to facilitate calibration, a calibration point is provided at the center of the rotating platform 3 , and when the detection base 8 is located at the origin of coordinates, the scanning probe 11 and the calibration point are on the same vertical line.

[0020] The present invention also provides a multimodal measurement method of a three-dimensional coordinate measuring machine, the method using the above-mentioned multimodal measurement system; comprising: Adjust the positions of the gantry 4 and the X-axis slider 7, and the Z-axis driving cylinder 6 is in a retracted 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; wherein, the position of the gantry 4 is driven by the Y-axis slider, and the Y-axis slider slides in the Y-axis slide groove 10, which is realized by the second driving device. Since driving the gantry 4 to slide in the Y-axis slide groove 10 belongs to the prior art, the present application does not limit the specific sliding process of the Y-axis slider and the Y-axis slide groove 10; the position of the X-axis slider 7 can be achieved by the relative rotation of the X-axis slider 7 and the screw 5. For example, a driving motor and a nut matching the screw 5 are arranged inside the slider, and the nut is driven by the driving motor to rotate on the screw, thereby driving the X-axis slider 7 to slide relative to the screw 5.

[0021] The workpiece is placed on the rotating platform 3, and the probe cylinder 14 and the Z-axis driving cylinder 6 are adjusted so that the detection head is placed on the inner wall of the workpiece, and the first driving device is started to control the rotation of the workpiece to obtain the internal parameters of the workpiece; The probe cylinder 14 and the Z-axis driving cylinder 6 are adjusted again so that the detection head is placed on the outer wall of the workpiece to obtain the external parameters of the workpiece.

[0022] like Figure 5 As shown, when measuring the inner wall of the workpiece, adjust the probe cylinder 14 and the Z-axis drive cylinder 6 so that the external detection head of the two-way detection rod 12 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 two-way detection rod 12 slides toward the axial direction of the detection base 8 under the action of the spring 16 to obtain the internal parameters of the workpiece.

[0023] like Figure 6 As shown, when measuring the outer wall of the workpiece, adjust the probe cylinder 14 and the Z-axis drive cylinder 6 so that the internal detection head of the two-way detection rod 12 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 12 slides away from the axis of the detection base 8 under the action of the spring 16 to obtain the external parameters of the workpiece.

[0024] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

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 inside, which are used to drive the rotating platform and the Y-axis slider respectively.

2. The multi-modal measurement system of a three-dimensional coordinate measuring machine according to claim 1, characterized in that: 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 included angle between adjacent slide grooves is 120°, and the positions of the three probe cylinders are adapted to the three slide grooves.

3. The multimodal measurement system of a three-dimensional coordinate measuring machine according to claim 2, characterized in that: 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.

4. The multi-modal measurement system of a three-dimensional coordinate measuring machine according to claim 3, characterized in that: 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 fixing 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.

5. The multi-modal measurement system of a three-dimensional coordinate measuring machine according to claim 4, 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.

6. The multi-modal measurement system of a three-dimensional coordinate measuring machine according to claim 5, 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.

7. A multimodal measurement method of a three-dimensional coordinate measuring machine, characterized in that: The method adopts the multimodal measurement system of claim 6; 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.

8. The multi-modal measurement method of a three-dimensional coordinate measuring machine according to claim 7, 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.

9. The multi-modal measurement method of a three-dimensional coordinate measuring machine according to claim 8, 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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