Gantry three-coordinate measuring machine

Abstract

The utility model discloses a gantry three-coordinate measuring machine, which comprises a cross beam, the cross section of the cross beam is an isosceles right triangle, and the cross beam comprises a hypotenuse part; a first right-angle notch part and a second right-angle notch part are respectively formed at two 45-degree corner parts of the cross beam; the sliding frame comprises a sliding frame connecting plate, and the sliding frame connecting plate is parallel to the bevel edge part; a first air floating sliding block and a second air floating sliding block are arranged at the bottom of the sliding frame connecting plate, the first air floating sliding block is in sliding contact with the first intersection part, and the second air floating sliding block is in sliding contact with the bevel edge part; a third air floating sliding block and a fourth air floating sliding block are installed on the top of the sliding frame connecting plate, the third air floating sliding block is in sliding contact with the second intersection part, and the fourth air floating sliding block is in sliding contact with the bevel edge part. Through the distribution of the six air floating sliding blocks, stable, effective and symmetrical sliding support can be realized for the cross beam, so that the sliding frame moves more stably, the abrasion of the sliding frame is reduced, the motion performance is obviously improved, the motion torsional pendulum is reduced, and the measurement precision of the measuring machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gantry measuring machines, in particular to a gantry three-coordinate measuring machine. Background Art

[0002] The gantry type three-dimensional coordinate measuring machine is a precision measuring device for three-dimensional geometric measurement, including a beam, a Y guide rail, a carriage, a Z axis, a measuring head and a computer control system. These basic structures provide stable support and guidance, allowing the measuring head to move up and down, left and right, and forward and backward, with a wide range of measurements. The carriage moves along the beam in the X direction, the beam moves along the Y guide rail in the Y direction, and the Z axis moves up and down in the Z direction, so that the measuring head can move in the X direction, Y direction and Z direction. The measuring head obtains coordinate data by touching the surface of the object being measured, and then the computer analyzes and processes this data through professional software to provide measurement results and reports.

[0003] The existing technology uses many advanced technical means and methods in the gantry type three-dimensional coordinate measuring machine. Among them, high-precision sensors and electronic devices enable the measuring head to quickly and accurately capture the position and direction information of the measured point. The guide rail system uses structures such as linear guides and air flotation to provide stable guidance and motion control capabilities.

[0004] However, the prior art also has some problems and shortcomings in the gantry-type three-dimensional coordinate measuring machine. For example, the existing measuring machine uses a gear rack transmission, which may cause deformation and wear of the rack during long-term use and environmental changes, thereby affecting the overall straightness of the rack and causing the overall accuracy of the measuring machine to decrease. In addition, when the measuring equipment is running at high speed, in the X direction, the friction of the slide movement is large, and the mechanical vibration and noise generated by the movement of the slide are large, which cannot ensure that the measuring head can move smoothly and accurately, resulting in low measurement accuracy. Similarly, in the X direction, the friction of the Z axis moving up and down is large, and the mechanical vibration and noise generated by the Z axis movement are large, resulting in a large torsion swing, which cannot ensure that the measuring head can move smoothly and accurately, resulting in low measurement accuracy. Summary of the invention

[0005] The utility model aims to provide a gantry three-dimensional coordinate measuring machine. Through the distribution arrangement of six air-floating slide blocks on the slide, a stable, effective and symmetrical sliding support can be achieved for the crossbeam, the movement of the slide can be made more stable, the wear of the slide can be reduced, the movement performance can be significantly improved, the movement torsion can be reduced, and the measurement accuracy of the measuring machine can be improved.

[0006] To this end, the utility model provides a gantry three-dimensional coordinate measuring machine, including a crossbeam, the cross section of the crossbeam is an isosceles right triangle, including a hypotenuse; the two 45° angles of the crossbeam are respectively formed with a first right-angle notch and a second right-angle notch, the first right-angle notch includes a first intersection with the hypotenuse at 45°, the second right-angle notch includes a second intersection with the hypotenuse at 45°, a slide, the slide slides along the crossbeam, the slide includes a slide connecting plate, the slide connecting plate is connected to the The beveled edges are parallel; two bottom air-floating slider groups are provided at the bottom of the slide connecting plate, and the air-floating slider group includes a first air-floating slider and a second air-floating slider, the first air-floating slider is in sliding contact with the first intersection, and the second air-floating slider is in sliding contact with the beveled edge; a top air-floating slider group is installed at the top of the slide connecting plate, and the top air-floating slider group includes a third air-floating slider and a fourth air-floating slider, the third air-floating slider is in sliding contact with the second intersection, and the fourth air-floating slider is in sliding contact with the beveled edge.

[0007] Preferably, the center point connecting the top air-floating slider group and the two bottom air-floating slider groups can form an isosceles triangle or an equilateral triangle.

[0008] Preferably, the interior of the crossbeam is a symmetrical hollow structure, and the crossbeam includes a first portion and a second portion that are perpendicular to each other, and the hypotenuse portion is connected between the side edge of the first portion and the side edge of the second portion.

[0009] Preferably, a first reinforcing portion is vertically provided on the inner side of the first portion, a second reinforcing portion is vertically provided on the inner side of the second portion, and a third reinforcing portion is vertically provided on the inner side of the hypotenuse portion; and the side edges of the first reinforcing portion, the second reinforcing portion and the third reinforcing portion intersect on the same side.

[0010] Preferably, both ends of the bevel portion are provided with limit blocks respectively, and the limit blocks are used to limit the sliding of the slide.

[0011] Preferably, a first connecting plate and a bottom connecting block are provided at the bottom of the slide connecting plate, a second connecting plate is provided on the bottom connecting block, and the angle between the surfaces where the first connecting plate and the second connecting plate are located is 45°; the first air-floating slider is installed on the first connecting plate, and the second air-floating slider is installed on the second connecting plate.

[0012] Preferably, a protruding top connecting block is provided on the top of the slide connecting plate, a fourth connecting plate extending vertically downward is provided on the top connecting block, and the fourth air-floating sliding block is mounted on the fourth connecting plate.

[0013] Preferably, a third connecting plate for connecting the third air-floating slider is provided on the top of the slide connecting plate, and the angle between the third connecting plate and the surface where the fourth connecting plate is located is 45°.

[0014] Preferably, it further comprises a Z-axis, which is in the shape of a rectangular parallelepiped; four vertical air-floating sliders are connected to the vertical right-angled sides of the slide connecting plate, and the four vertical air-floating sliders are in sliding contact with the four side surfaces of the Z-axis respectively.

[0015] Preferably, it also includes a main rail, a saddle is provided at one end of the cross beam, and six main rail air-floating sliders are provided on the saddle; two of the main rail air-floating sliders are arranged above the top surface of the main rail, two of the main rail air-floating sliders are arranged on the left side of the main rail, and two of the main rail air-floating sliders are arranged on the right side of the main rail.

[0016] Compared with the prior art, the advantages and positive effects of the utility model are as follows: the utility model provides a gantry three-dimensional coordinate measuring machine, comprising a crossbeam, the cross section of the crossbeam is an isosceles right triangle, including a hypotenuse; two 45° angles of the crossbeam are respectively formed with a first right-angle notch and a second right-angle notch, the first right-angle notch includes a first intersection with the hypotenuse at 45°, the second right-angle notch includes a second intersection with the hypotenuse at 45°, a slide, the slide slides along the crossbeam, the slide includes a slide connecting plate, The slide connecting plate is parallel to the hypotenuse; the bottom of the slide connecting plate is provided with two spaced bottom air-floating slider groups, the air-floating slider group includes a first air-floating slider and a second air-floating slider, the first air-floating slider is in sliding contact with the first intersection, and the second air-floating slider is in sliding contact with the hypotenuse; the top of the slide connecting plate is installed with a top air-floating slider group, the top air-floating slider group includes a third air-floating slider and a fourth air-floating slider, the third air-floating slider is in sliding contact with the second intersection, and the fourth air-floating slider is in sliding contact with the hypotenuse. Through the distribution arrangement of the six air-floating sliders of the utility model, a stable, effective and symmetrical sliding support can be achieved for the crossbeam, the movement of the slide can be made more stable, the wear of the slide can be reduced, the movement performance can be significantly improved, the movement torsion can be reduced, and the measurement accuracy of the measuring machine can be improved. Through the distribution arrangement of the six air-floating sliders of the utility model, a more stable, uniform and symmetrical sliding friction can be provided. At the same time, the layout of the six air-floating sliders can balance the distribution of force and reduce the generation of mechanical vibration and noise.

[0017] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a structural schematic diagram of an embodiment of the gantry three-coordinate measuring machine of the utility model;

[0019] Figure 2 It is a structural schematic diagram of an embodiment of the gantry three-coordinate measuring machine of the utility model;

[0020] Figure 3 yes Figure 2 Enlarged view of part A;

[0021] Figure 4 It is a partial structural schematic diagram of an embodiment of the gantry three-coordinate measuring machine of the utility model;

[0022] Figure 5 It is a structural schematic diagram of an embodiment of the slide of the utility model;

[0023] Figure 6 It is a structural schematic diagram of an embodiment of the slide of the utility model;

[0024] Figure 7 It is a structural schematic diagram of an embodiment of the utility model crossbeam;

[0025] Figure 8 It is a structural schematic diagram of an embodiment of the utility model crossbeam;

[0026] Fig. 9 yes Figure 2 Enlarged view of part B;

[0027] Fig.10 yes Figure 2 Enlarged view of part C. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] The utility model of the gantry three-dimensional coordinate measuring machine comprises a crossbeam 10, the cross section of the crossbeam 10 is an isosceles right triangle, and comprises a hypotenuse 11; two 45° angles of the crossbeam 10 are respectively formed with a first right-angle notch 12 and a second right-angle notch 13, the first right-angle notch 12 comprises a first intersection 121 intersecting with the hypotenuse 11 at 45°, the second right-angle notch 13 comprises a second intersection 131 intersecting with the hypotenuse 11 at 45°, and a slide 20, the slide 20 slides along the crossbeam 10, the slide 20 comprises a slide connecting plate 21, and the slide connecting plate 21 and the slide connecting plate 21 are connected The bevel portion 11 is parallel; two bottom air-floating slider groups are provided at the bottom of the slide connecting plate 21, and the air-floating slider group includes a first air-floating slider 22 and a second air-floating slider 23. The first air-floating slider 22 is in sliding contact with the first intersection portion 121, and the second air-floating slider 23 is in sliding contact with the bevel portion 11; a top air-floating slider group is installed on the top of the slide connecting plate 21, and the top air-floating slider group includes a third air-floating slider 24 and a fourth air-floating slider 25. The third air-floating slider 24 is in sliding contact with the second intersection portion 131, and the fourth air-floating slider 25 is in sliding contact with the bevel portion 11.

[0030] The six air-floating sliders on the slide 20 are distributed in a symmetrical triangle. Specifically, a third air-floating slider 24 and a fourth air-floating slider 25 form a top air-floating slider group and are installed on the top of the slide 20. A first air-floating slider 22 and a second air-floating slider 23 form a bottom air-floating slider group and are installed at one end of the bottom of the slide 20. Another first air-floating slider 22 and another second air-floating slider 23 form a bottom air-floating slider group and are installed at the other end of the bottom of the slide 20. The center points connecting the top air-floating slider group and the two top air-floating slider groups can form an equilateral or isosceles triangle, so that the six air-floating sliders can be wrapped on the beam 10.

[0031] Through the distribution of the six air-floating sliders of the utility model, a stable, effective and symmetrical sliding support can be achieved for the crossbeam 10, the movement of the slide 20 can be made more stable, the wear of the slide 20 can be reduced, the motion performance can be significantly improved, the motion torsion can be reduced, and the measurement accuracy of the measuring machine can be improved. Through the distribution of the six air-floating sliders of the utility model, a more stable, uniform and symmetrical sliding friction force can be provided. At the same time, the layout of the six air-floating sliders can balance the distribution of force and reduce the generation of mechanical vibration and noise.

[0032] The cross beam 10 can be integrally formed by welding, extrusion and / or other processes commonly used in the art, which are not specifically limited herein.

[0033] The cross section of the cross beam 10 is an isosceles right triangle, which can make the cross beam 10 have good stability and high structural strength. The use of the triangular cross beam 10 and the carriage 20 has little effect on the accuracy of the measuring machine. The triangular cross beam 10 structure has good rigidity and stability, can provide good support and positioning reference, and the carriage 20 can achieve smooth movement and positioning on the cross beam 10.

[0034] The interior of the cross beam 10 is a symmetrical hollow structure, which is conducive to the lightweight design of the cross beam 10, making the cross beam lighter. The symmetrical hollow structure can make the cross beam 10 have better bending and torsion resistance; in addition, the symmetrical hollow structure can also make the basic profiles of the cross beam 10 similar in size and volume, so that the cross beam 10 can be extruded by the same model of extruder, thereby reducing the cost of extrusion equipment.

[0035] The cross beam 10 includes a first portion 14 and a second portion 15 which are perpendicular to each other, and a hypotenuse portion 11 is connected between the side of the first portion 14 and the side of the second portion 15. The first portion 14, the second portion 15 and the hypotenuse portion 11 are integrally extruded, so that the overall structural strength of the cross beam 10 is high and the structure is stable and reliable.

[0036] A first reinforcing portion 141 is vertically disposed on the inner side of the first portion 14, and the first portion 14 and the first reinforcing portion 141 are integrally extruded; a second reinforcing portion 151 is vertically disposed on the inner side of the second portion 15, and the second portion 15 and the second reinforcing portion 151 are integrally extruded; a third reinforcing portion 111 is vertically disposed on the inner side of the hypotenuse portion 11, and the hypotenuse portion 11 and the third reinforcing portion 111 are integrally extruded; the sides of the first reinforcing portion 141, the second reinforcing portion 151 and the third reinforcing portion 111 intersect at the same side. By providing the first reinforcing portion 141, the second reinforcing portion 151 and the third reinforcing portion 111, a supporting and reinforcing effect can be achieved, so that the overall structural strength of the beam 10 is high, the structure is stable and reliable, and the bending and torsion resistance of the beam 10 is better.

[0037] Limit blocks 16 are respectively provided at both ends of the bevel portion 11, and the limit blocks 16 are used to limit the sliding of the slide 20. The slide 20 slides along the beam 10, and when the slide 20 slides to the position of the limit blocks 16, the control system controls the slide 20 to stop sliding.

[0038] The two 45° angles of the cross beam 10 are respectively formed with a first right-angle notch 12 and a second right-angle notch 13 , which reserve installation space for the installation of components such as an air-floating slider and a grating scale.

[0039] The slide 20 may be integrally formed by a welding process, an extrusion process and / or other processes commonly used in the art, which are not specifically limited herein.

[0040] The carriage 20 includes a carriage main board 26, on which an inclined edge is provided, and the inclined edge of the carriage main board 26 is parallel to the inclined edge portion 11 of the cross beam 10, and the carriage connecting plate 21 is vertically fixed to the inclined edge of the carriage main board 26, so that the carriage connecting plate 21 can be parallel to the inclined edge portion 11 of the cross beam 10. The carriage connecting plate 21 and the carriage main board 26 are integrally formed by an extrusion process, and no specific limitation is made here.

[0041] A through hole 261 is provided on the slide main board 26. The provision of the through hole 261 can facilitate a lightweight design of the slide 20, thereby making the slide 20 lighter and reducing the extrusion cost.

[0042] A bottom connecting block 211 is provided at the bottom of the carriage connecting plate 21, and a first connecting plate 212 and a second connecting plate 213 are provided on the bottom connecting block 211. The number of the first air-floating sliders 22 can be two, and the two first air-floating sliders 22 are respectively mounted at both ends of the first connecting plate 212; the number of the second air-floating sliders 23 is two, and the two second air-floating sliders 23 are respectively mounted at both ends of the second connecting plate 213; the installation method of the air-floating sliders can be a fixed installation method commonly used in the technical field, and no specific limitation is made here.

[0043] Since the first intersection portion 121 intersects with the hypotenuse portion 11 at 45°, by setting the plane angle between the first connecting plate 212 and the second connecting plate 213 to be 45°, it is convenient to install the first air-floating slider 22 on the first connecting plate 212, and it is convenient to install the second air-floating slider 23 on the second connecting plate 213, so that the first air-floating slider 22 can slide in contact with the first intersection portion 121, and the second air-floating slider 23 can slide in contact with the hypotenuse portion 11.

[0044] A protruding top connecting block 214 is provided on the top of the slide connecting plate 21 , and a third connecting plate 215 and a fourth connecting plate 216 are provided on the top connecting block 214 . The angle between the surfaces where the third connecting plate 215 and the fourth connecting plate 216 are located is 45°.

[0045] The third air-floating slider 24 is mounted on the third connecting plate 215 , and the fourth air-floating slider 25 is mounted on the fourth connecting plate 216 .

[0046] Since the second intersection portion 131 intersects with the hypotenuse portion 11 at 45°, by setting the angle between the surfaces where the third connecting plate 215 and the fourth connecting plate 216 are located to be 45°, it is convenient to install the third air floating slider 24 on the third connecting plate 215, and it is convenient to install the fourth air floating slider 25 on the fourth connecting plate 216, so that it is convenient to realize the sliding contact between the third air floating slider 24 and the second intersection portion 131, and the sliding contact between the fourth air floating slider 25 and the hypotenuse portion 11.

[0047] The total number of the first air-floating slider 22, the second air-floating slider 23, the third air-floating slider 24 and the fourth air-floating slider 25 is six. The six air-floating sliders introduce high-pressure air into the air cavity to form an air static pressure in the air cavity, thereby producing an air-floating effect. A thin air film can be formed between the slide 20 and the beam 10, so that the slide 20 can smoothly slide in the X direction on the air film, reducing the friction and wear of the movement of the slide 20, providing smooth and frictionless movement, reducing deformation and mechanical vibration, and ensuring the stability and accuracy of the measurement process.

[0048] The six air-floating sliders on the slide 20 are distributed in a symmetrical triangle. Specifically, a third air-floating slider 24 and a fourth air-floating slider 25 form a top air-floating slider group and are installed on the top of the slide 20, a first air-floating slider 22 and a second air-floating slider 23 form a bottom air-floating slider group and are installed at one end of the bottom of the slide 20, another first air-floating slider 22 and another second air-floating slider 23 form a bottom air-floating slider group and are installed at the other end of the bottom of the slide 20, and the center points connecting the top air-floating slider group and the two top air-floating slider groups can form an equilateral or isosceles triangle, so that the six air-floating sliders can be wrapped on the beam 10.

[0049] Through the distributed arrangement of the six air-floating sliders of the utility model, a smooth, effective and symmetrical sliding support can be achieved for the crossbeam 10, the movement of the slide 20 can be made more stable, the wear of the slide 20 can be reduced, the motion performance can be significantly improved, the motion torsion can be reduced, and the measurement accuracy of the measuring machine can be improved.

[0050] The six air-floating sliders of the utility model can provide a more stable, uniform and symmetrical sliding friction force. At the same time, the layout of the six air-floating sliders can balance the distribution of force and reduce the generation of mechanical vibration and noise.

[0051] Each air-floating slider controls the air pressure in the air cavity through an air flow regulating valve, thereby adjusting the size of the air buoyancy to achieve motion and stability control of the slide 20. These air-floating sliders can be centrally controlled by a computer or control system to achieve precise adjustment and positioning of the slide 20.

[0052] When using the gantry measuring machine, the size of the air buoyancy can be adjusted by adjusting the opening of the airflow regulating valve on the carriage 20, thereby affecting the movement speed and accuracy of the carriage 20. Generally speaking, the larger the opening of the airflow regulating valve, the greater the air buoyancy, and the faster the movement speed of the carriage 20; the smaller the opening of the airflow regulating valve, the smaller the air buoyancy, and the slower the movement speed of the carriage 20.

[0053] The gantry three-dimensional coordinate measuring machine of the utility model further comprises a Z-axis 30 , which is in the shape of a vertically arranged rectangular parallelepiped and can move up and down.

[0054] A vertical edge is provided on the slide main board 26, and a vertically arranged first connecting plate 262 is connected to the vertical edge. The two sides of the first connecting plate 262 are vertically connected to a vertically arranged second connecting plate 263 and a third connecting plate 264 respectively. The second connecting plate 263 is vertically connected to a fourth connecting plate 265, and the fourth connecting plate 265 extends toward the third connecting plate 264.

[0055] Vertical air-floating sliders 27 are installed on the inner side surfaces of the upper ends and the lower ends of the first connecting plate 262, the second connecting plate 263, the third connecting plate 264, and the fourth connecting plate 265. The four vertical air-floating sliders 27 at the upper ends are in sliding contact with the four surfaces of the Z-axis 30 respectively, and the four vertical air-floating sliders 27 at the lower ends are in sliding contact with the four surfaces of the Z-axis 30 respectively, which can make the up and down movement of the Z-axis 30 more stable, reduce the wear of the Z-axis 30, significantly improve the motion performance and reduce the motion oscillation, thereby improving the measurement accuracy of the measuring machine.

[0056] At least one of the four vertical air-floating sliders 27 at the upper end is a rigid air-floating slider, and the rest are elastic air-floating sliders; similarly, at least one of the four vertical air-floating sliders 27 at the lower end is a rigid air-floating slider, and the rest are elastic air-floating sliders. The rigid air-floating slider and the elastic air-floating slider are combined to reduce the air-floating gap to a minimum by adjusting the pressure of the elastic bearing, so as to improve the dynamic response speed of the system and reduce the influence of mechanical vibration on the measurement results. At the same time, the rigid bearing can provide sufficient support force to ensure that the Z-axis 30 will not produce excessive deformation or vibration during the movement, while the elastic bearing can absorb and reduce the influence of external disturbances on the Z-axis 30, improve the adaptability of the entire air-floating system to environmental changes, and make its movement more stable and reliable.

[0057] The surface of the Z-axis 30 is coated with a high-density hard coating, which can significantly improve the surface hardness and wear resistance of the Z-axis 30, reduce the risk of scratches, wear and impact on the Z-axis 30, and extend the service life of the Z-axis 30. At the same time, the high-density hard coating has low adhesion, which can reduce the possibility of impurities and contaminants adhering to the surface of the Z-axis 30, and ensure the accuracy and reliability of the up and down movement of the Z-axis 30.

[0058] The gantry three-dimensional coordinate measuring machine of the utility model also includes two transversely arranged main guide rails 40 and auxiliary guide rails 50. The slide 20 can move along the beam 10 to achieve X-direction movement; the beam 10 can move along the main guide rails 40 and the auxiliary guide rails 50 to achieve Y-direction movement; the Z-axis 30 moves up and down along the slide 20 to achieve Z-direction movement.

[0059] The Y-axis transmission adopts belt drive, which can improve the positioning accuracy, motion smoothness and transmission accuracy of the measuring machine. Due to the large contact area of ​​the belt drive, it can provide better transmission torque and motion smoothness, thereby ensuring higher positioning accuracy. Compared with the rack and pinion drive, the belt drive can reduce or eliminate the gap problem in the transmission process and improve the rigidity of the transmission. In contrast, there is a backlash problem in the rack and pinion drive, which needs to be eliminated, and the backlash elimination device will produce many uncertainties in long-term and highly repetitive movements, which may cause the looseness of the movement to increase. The belt drive has less friction, which can reduce the impact and vibration in the transmission, improve the running stability of the measuring machine, and reduce the transmission noise.

[0060] In terms of cost and post-maintenance, belt drives usually use materials with good wear resistance, such as polyurethane materials, which are not easy to wear. In contrast, rack and pinion drives are prone to wear due to tooth surface contact and friction, and require more frequent maintenance and replacement. Even if a belt drive needs to be replaced, its replacement cost is lower and the replacement steps are simpler. It usually only needs to be connected to the transmission shaft, and does not require complex transmission components. It can be replaced wherever it needs to be replaced; the structures are independent of each other. In contrast, rack and pinion drives require more transmission gears, racks, and other parts, and their installation coordination and adjustment of straightness are very cumbersome and complicated.

[0061] The main guide rail 40 and the auxiliary guide rail 50 adopt double gratings, and two grating rulers are used in the Y-axis direction to realize measurement, which has the following advantages:

[0062] 1. Provide higher measurement accuracy. The dual grating structure can compare and correct the readings of the two grating scales to eliminate errors and drifts, thereby improving the accuracy and precision of the measurement.

[0063] 2. Achieve higher measurement resolution. Through the superposition reading and calculation of two grating scales, higher measurement resolution can be achieved. This can measure smaller dimensional changes and improve the subtle accuracy of measurement.

[0064] 3. Improve measurement stability. The use of a dual grating structure can achieve double verification of the grating scale reading, thereby improving measurement stability. By reading the signals of two grating scales at the same time, possible drift and errors can be detected and corrected.

[0065] 4. Achieve better motion smoothness. The dual grating structure can provide smoother motion control and reduce mechanical vibration and instability. This is very beneficial for achieving high-speed and high-precision measurement motion.

[0066] 5. Add fault detection and automatic calibration functions. The dual grating structure can detect and diagnose any potential faults or abnormalities by comparing the readings of the two grating scales. Through automatic calibration and correction, the stability and reliability of the measuring instrument can be improved.

[0067] The main guide rail 40 and the auxiliary guide rail 50 may be in the shape of a rectangular parallelepiped. The material of the main guide rail 40 and the auxiliary guide rail 50 may be granite. Using rectangular parallelepiped granite as a guide rail has the following advantages over the traditional aluminum alloy triangular guide rail:

[0068] The rectangular granite has higher density and hardness, and has better rigidity and stability than aluminum alloy materials. This enables the gantry measuring machine that uses rectangular granite as the Y guide rail to better resist external vibration and deformation during movement, thereby improving the accuracy and repeatability of the machine.

[0069] 2. The thermal expansion coefficient of rectangular granite is lower than that of aluminum alloy. In an environment with large temperature changes, the influence of rectangular granite on temperature is smaller, which can ensure higher measurement accuracy and stability.

[0070] 3. The rectangular granite has excellent wear resistance and corrosion resistance, and can resist common wear and corrosion problems, which makes the Y guide rail of the gantry measuring machine more durable and extends its service life.

[0071] 4. The surface of the rectangular granite has been specially treated to have a lower friction coefficient. This means that the gantry measuring machine can reduce friction resistance when moving, improving the positioning accuracy and movement smoothness of the machine.

[0072] 5. Rectangular granite has a high ability to resist deformation and can maintain good geometric shape and mechanical properties even under heavy loads. This allows the gantry measuring machine using rectangular granite as the Y guide rail to maintain high accuracy and stability under high loads and long working hours.

[0073] like Fig. 9 As shown, a main saddle 16 is provided at the end of the crossbeam 10, and the main saddle 16 slides along the main rail 40. Six main rail air-floating sliders 17 are provided on the main saddle 16, and the six main rail air-floating sliders 17 are all large in size. Two of the main rail air-floating sliders 17 are arranged above the top surface of the main rail 40, two of the main rail air-floating sliders 17 are arranged on the left side of the main rail 40, and two of the main rail air-floating sliders 17 are arranged on the right side of the main rail 40. The six main rail air-floating sliders 17 surround the top and both sides of the main rail 40, which can provide sufficient support and stability, and allow the crossbeam 10 to move smoothly along the main rail 40.

[0074] At the same time, it allows the slider to move smoothly on the guide rail.

[0075] 1. Improve stability: The use of large-sized air-floating sliders can provide a larger contact area, increase the contact area between the main legs of the beam and the ground, thereby improving the stability of the support, reducing machine movement and deformation caused by external force or vibration, and ensuring the accuracy of the measuring machine.

[0076] 2. The large-sized air-floating slider can increase the rigidity of the overall structure, reduce deflection and deformation, reduce the error generated by the beam 10 during movement, and improve the accuracy of measurement.

[0077] 3. The use of a large-sized air-floating slider can effectively reduce the impact of external vibration on the measuring machine. The air-floating slider can reduce the vibration transmission between the beam 10 and the ground through gas shock absorption and isolation, providing a more stable working environment.

[0078] 4. Six large-sized air-floating sliders are semi-enclosed, and the pressure of each air-floating can be adjusted independently to achieve fine-tuning of the main legs of the crossbeam. This can better adjust the levelness and stability of the measuring machine and improve the accuracy and stability of the measurement.

[0079] 5. Six large-sized air-floating sliders serve as independent support devices for easy maintenance and replacement. If a failure occurs or parts need to be replaced, they can be directly disassembled for more convenient repair and replacement, reducing downtime and maintenance costs.

[0080] like Fig.10 As shown, the other end of the cross beam 10 is provided with a secondary saddle 19, which slides along the main rail 40, and a secondary rail air-floating slider 18 is provided on the secondary saddle 19, and the secondary rail air-floating slider 18 is large in size. The secondary rail air-floating slider 18 is arranged above the top surface of the secondary rail 50, which can provide sufficient support and stability, while allowing the cross beam 10 to move smoothly along the secondary rail 50.

[0081] like Figure 1 As shown, the end of the crossbeam 10 is sleeved with a main protective shell 161, which can protect the main saddle 16 and the six main rail air-floating sliders 17. The other end of the crossbeam 10 is sleeved with a secondary protective shell 191, which can protect the secondary saddle 19 and the secondary rail air-floating slider 18. The slide 20 is sleeved with a slide protection shell 28, which can protect the slide 20.

[0082] like Figure 1 , Figure 2As shown, the bottom of the main rail 40 and the auxiliary rail 50 are both provided with a plurality of spaced columns 60, through which the measuring machine can stand firmly on the ground. The columns 60 can provide high rigidity and stability, and have little impact on processing and environmental conditions. The columns 60 can be cast, which can effectively reduce external vibration and factors affecting measurement accuracy. The columns 60 occupy a small space in the vertical direction and do not occupy too much area around the object to be measured, so that the measuring machine can measure in a relatively small working space.

[0083] It can be designed and assembled according to specific needs, and the height and size of the column 60 can be flexibly adjusted to adapt to different measurement requirements and working environments. In addition, the column support structure also has high scalability, and accessories and additional functions can be added as needed.

[0084] A pad 61 is provided at the bottom of the column 60, and the pad 61 is in direct contact with the ground. The pad 61 is rectangular, and the column is in the shape of a cuboid. The area of ​​the pad 61 is larger than the projected area of ​​the column 60; thus, the pad 61 can disperse the weight load, reduce the stress concentration of the bottom structure, and reduce the risk of deformation. The pad 61 can provide a wider contact area, so that the bottom of the measuring machine can evenly distribute the weight and provide more stable support. This helps to reduce the vibration and deformation of the measuring machine during use to ensure the precision and accuracy of the measurement. At the same time, by adjusting the thickness of the pad 61, the horizontal balance of the measuring machine can be adjusted to a certain extent. At the same time, the pad 61 can be adjusted and replaced as needed to adapt to the size and weight of different workpieces, thereby providing better stability and accuracy.

[0085] The three-coordinate measuring machine of the utility model has higher measurement accuracy and can measure various sizes and shapes of products more accurately; it has a larger workbench area and measurement space, can accommodate larger parts for measurement, provides a wider range of application scenarios, and fills the gap in the technical field of gantry-type three-coordinate measuring machines.

[0086] The gantry three-coordinate measuring machine of this utility model can quickly and accurately measure the size and shape of parts during the production process, and timely discover quality problems in production, thereby improving production efficiency. At the same time, it can comprehensively measure and analyze the product, and can accurately detect the deviation between the product size and design requirements, helping the company to achieve better quality control and ensure that the product meets customer requirements.

[0087] The gantry three-coordinate measuring machine of this utility model has low production cost and high measurement accuracy, and has greater competitive advantages in the market. By improving production efficiency and optimizing quality control, the company can provide higher quality products and better meet customer needs, thereby enhancing competitiveness.

[0088] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A gantry coordinate measuring machine, characterized in that: include A crossbeam, wherein the cross section of the crossbeam is an isosceles right triangle and includes a hypotenuse; two 45° angles of the crossbeam are respectively formed with a first right-angle notch and a second right-angle notch, wherein the first right-angle notch includes a first intersection portion intersecting the hypotenuse at 45°, and the second right-angle notch includes a second intersection portion intersecting the hypotenuse at 45°, A slide, wherein the slide slides along the cross beam, the slide comprises a slide connecting plate, and the slide connecting plate is parallel to the hypotenuse; two bottom air-floating slider groups are provided at the bottom of the slide connecting plate, and the air-floating slider group comprises a first air-floating slider and a second air-floating slider, the first air-floating slider is in sliding contact with the first intersection, and the second air-floating slider is in sliding contact with the hypotenuse; a top air-floating slider group is installed at the top of the slide connecting plate, and the top air-floating slider group comprises a third air-floating slider and a fourth air-floating slider, the third air-floating slider is in sliding contact with the second intersection, and the fourth air-floating slider is in sliding contact with the hypotenuse.

2. The gantry coordinate measuring machine according to claim 1, characterized in that: The center point connecting the top air-floating slider group and the two bottom air-floating slider groups can form an isosceles triangle or an equilateral triangle.

3. The gantry coordinate measuring machine according to claim 1, characterized in that: The interior of the crossbeam is a symmetrical hollow structure. The crossbeam includes a first portion and a second portion that are perpendicular to each other. The oblique edge portion is connected between the side edge of the first portion and the side edge of the second portion.

4. The gantry coordinate measuring machine according to claim 3, characterized in that: A first reinforcing portion is vertically disposed on the inner side of the first portion, a second reinforcing portion is vertically disposed on the inner side of the second portion, and a third reinforcing portion is vertically disposed on the inner side of the hypotenuse portion; The side edges of the first reinforcing portion, the second reinforcing portion and the third reinforcing portion intersect at the same side.

5. The gantry coordinate measuring machine according to claim 1, characterized in that: Limit blocks are respectively arranged at both ends of the bevel portion, and the limit blocks are used to limit the sliding of the slide.

6. The gantry coordinate measuring machine according to claim 1, characterized in that: A first connecting plate and a bottom connecting block are provided at the bottom of the slide connecting plate, a second connecting plate is provided on the bottom connecting block, and the angle between the surfaces where the first connecting plate and the second connecting plate are located is 45°; The first air-floating slider is mounted on the first connecting plate, and the second air-floating slider is mounted on the second connecting plate.

7. The gantry coordinate measuring machine according to claim 1, characterized in that: A protruding top connecting block is provided on the top of the slide connecting plate, a fourth connecting plate extending vertically downward is provided on the top connecting block, and the fourth air-floating sliding block is mounted on the fourth connecting plate.

8. The gantry coordinate measuring machine according to claim 7, characterized in that: A third connecting plate for connecting the third air-floating slider is disposed on the top of the slide connecting plate, and the angle between the third connecting plate and the surface where the fourth connecting plate is located is 45°.

9. The gantry coordinate measuring machine according to claim 1, characterized in that: Also includes a Z axis, the Z axis is a rectangular parallelepiped; Four vertical air-floating sliders are connected to the vertical right-angled sides of the slide connecting plate, and the four vertical air-floating sliders are in sliding contact with the four side surfaces of the Z axis respectively.

10. The gantry coordinate measuring machine according to claim 1, characterized in that: It also includes a main rail, one end of the crossbeam is provided with a saddle, and the saddle is provided with six main rail air-floating sliders; Two of the main rail air-floating sliders are arranged above the top surface of the main rail, two of the main rail air-floating sliders are arranged on the left side of the main rail, and two of the main rail air-floating sliders are arranged on the right side of the main rail.

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