A three-dimensional coordinate measuring machine with automatic calibration of measuring datum and aiming datum

Abstract

The invention discloses a three-dimensional coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference, and relates to the field of three-dimensional coordinate measuring machines, comprising a measuring table, wherein an adjustment bracket is arranged on one side of the measuring table, and an adjustment guide rail is arranged at the rear of the measuring table; a workbench arranged on the top of the measuring table and driven by the adjustment guide rail, wherein the workbench comprises a base, a top cover installed on the top of the base, and four guide through holes penetrating the base and the top cover; a fixing mechanism; and an adaptive dustproof component. The invention adjusts the position of the workbench by adjusting the guide rail, thereby driving the standard part to move, and does not need to repeatedly install and remove the standard part, so that the calibration work can be more convenient, labor and time can be saved, and efficiency can be improved. The position measurement of the workbench is realized by a laser interferometer, which is beneficial for the probe to automatically aim at the standard ball; the fixing mechanism is used in conjunction with the workbench, which not only realizes the convenient disassembly and installation of the standard part, but also can fix a plurality of standard parts of different heights for calibration, which is beneficial for improving accuracy.

Description

Technical Field

[0001] The invention relates to the technical field related to three-coordinate measuring machines, in particular to a three-coordinate measuring machine with automatic calibration of a measuring reference and an aiming reference. Background Art

[0002] The three axes of the three-dimensional coordinate measuring machine are equipped with air brake switches and micro-motion devices, which can realize the precision transmission of a single axis and adopt a high-performance data acquisition system. It is used in product design, mold equipment, gear measurement, blade measurement machinery manufacturing, fixtures, auto mold accessories, electronic appliances and other precision measurements. In order to ensure the measurement accuracy of the three-dimensional coordinate measuring machine, the three-dimensional coordinate measuring machine will be calibrated.

[0003] When calibrating a three-dimensional coordinate measuring machine, some standard devices are usually used for testing, such as gauge blocks, square boxes, ring gauges, standard balls and other standard parts. The measurement results are compared with the theoretical values. If they are not within the error range, the machine parameters must be adjusted accordingly to ensure the accuracy of the measurement.

[0004] In the actual calibration process, the standard parts need to be fixed on the measuring table for testing. After the test is completed, the standard parts need to be removed and put into the cabinet or installed again in a position that does not hinder the measurement of the probe. Each calibration requires repeated installation and disassembly of the standard parts, resulting in a waste of time and labor. Summary of the invention

[0005] In order to solve the defects in the prior art, the present invention provides a three-coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] The present invention discloses a three-dimensional coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference, comprising a measuring platform, an adjusting bracket is provided on one side of the measuring platform, and an adjusting guide rail is provided at the rear of the measuring platform;

[0008] A workbench driven by an adjustable guide rail is arranged on the top of the measuring table, the workbench comprises a base, a top cover installed on the top of the base, and four guide through holes penetrating the base and the top cover, and the base and the top cover are also provided with mounting grooves;

[0009] A fixing mechanism for fixing the standard part is arranged in the mounting groove of the base, the fixing mechanism comprises a transmission body rotatably connected to the base and a transmission wheel arranged outside the transmission body, the transmission wheel is rotatably connected to the base via an annular support assembly;

[0010] Adaptive dust shield assembly for blocking the guide through hole;

[0011] A driving mechanism disposed outside the measuring table and a probe assembly mounted at the moving end of the driving mechanism;

[0012] Laser interferometer to measure the table position and send the data to the embedded control and data processing system.

[0013] As a preferred technical solution of the present invention, the fixing mechanism also includes a support frame that fits with the inner wall of the mounting groove on the base and an operating rod used in conjunction with the transmission body, the support frame is provided with four avoidance openings distributed in a rectangular shape, a metal spring sheet is provided on one side of the avoidance opening, a fixed plug rod that can be plugged into the fixed socket on the standard part is penetrated by the metal spring sheet, a hemispherical head is provided at one end of the fixed plug rod, and a standard ball for calibration is provided at the upper end of the operating rod, and matching sliders are symmetrically provided on the outer wall of the lower end.

[0014] As a preferred technical solution of the present invention, at least one matching hole capable of matching with the hemispherical head is provided on the outer wall of the transmission wheel, a rotation groove is provided on the transmission wheel, and a plurality of meshing teeth are also provided on the inner wall of the transmission wheel.

[0015] As a preferred technical solution of the present invention, a sector gear meshing with the meshing teeth is sleeved and fixed on the outer wall of the transmission body, and a receiving groove cooperating with the operating rod is also provided on the top of the transmission body. A mating slideway cooperating with the mating slider is provided outside the accommodating groove, and the mating slideway includes a sliding ring groove, and two symmetrically distributed arc grooves are provided on one side of the sliding ring groove. Guide grooves are provided at both ends of the arc groove, and one of the guide grooves is connected to the sliding ring groove.

[0016] As a preferred technical solution of the present invention, the adaptive dustproof component includes a supporting end cover located at the bottom of the base and coaxial with the axis of the guide through hole, a sliding cover slidably arranged in the guide through hole, and a positioning piece embedded in the top of the top cover and coaxial with the axis of the guide through hole, annular magnets are symmetrically arranged at the bottom of the positioning piece, the supporting end cover is connected to the positioning piece via a connecting screw, the supporting end cover is also connected to the sliding cover via a reset spring, and a positioning block that can match the positioning hole at the bottom of the standard part is provided on the top of the sliding cover, an extension plate that can be magnetically connected to the annular magnet is provided on the outer wall of the sliding cover, and a mounting hole that can accommodate the connecting screw passing through is opened on the extension plate.

[0017] As a preferred technical solution of the present invention, the annular support assembly includes a T-shaped support ring rotatably matched with the rotating groove, a plurality of rollers rotatably arranged on the T-shaped support ring and rollingly matched with the rotating groove, and an annular support plate connected to the base is provided at the bottom of the T-shaped support ring.

[0018] As a preferred technical solution of the present invention, the adjustment bracket includes a support guide rail, a sliding seat slidably matched with the support guide rail, and a support frame rotatably arranged on the top of the sliding seat, the inner side of the sliding seat is symmetrically provided with rollers that roll with the support guide rail, the top of the support frame is provided with a support plate, and the inner side of the support frame is also slidably provided with a concave sliding seat connected to the support plate, and a locking bolt is screwed on the top of the support plate.

[0019] As a preferred technical solution of the present invention, the laser interferometer consists of a laser installed on the top of a support plate via an adjustable pan-tilt platform, an interference mirror group for dividing the laser beam emitted by the laser into a reference beam and a measurement beam, a reflector group for reflecting the light, and a plurality of environmental sensors arranged on a workbench. The interference mirror group is fixed to the top of the measuring platform via support structure one, and the reflector group is fixed to the base via support structure two.

[0020] As a preferred technical solution of the present invention, a load-bearing bracket is provided on the top of the adjusting guide rail movable body, a transmission plate is installed on the top of the load-bearing bracket, one end of the transmission plate is connected to the base via a connecting component, and a dustproof box is also provided outside the adjusting guide rail, and an electric switch door is provided at the outlet of the dustproof box.

[0021] As a preferred technical solution of the present invention, four avoidance grooves distributed in a rectangular shape are provided outside the installation groove on the base, and the avoidance grooves are connected to the guide through hole through a connecting hole that is slidably matched with the fixed plug rod.

[0022] The beneficial effects of the present invention are:

[0023] 1. This type of measuring reference and aiming reference automatically calibrates the three-dimensional coordinate measuring machine. The position of the workbench is adjusted by adjusting the guide rail, which can drive the standard parts to move. There is no need to repeatedly install and remove the standard parts, which can make the calibration work more convenient, save labor and time, and improve efficiency. The position measurement of the workbench is achieved through the laser interferometer, which is conducive to the automatic aiming of the probe at the standard ball.

[0024] 2. This kind of measuring reference and aiming reference automatic calibration three-dimensional measuring machine drives the transmission body by operating the operating lever. The rotating transmission body drives the sector gear, which drives the transmission wheel through the meshing transmission of the sector gear and the meshing teeth. The transmission wheel presses the hemispherical head to deform the metal spring. The hemispherical head will drive the fixed plug rod to insert into the fixed socket to complete the fixation of the standard parts. It not only realizes the convenience of disassembly and installation of standard parts, but also can fix multiple standard parts of different heights on the workbench for calibration, which is conducive to improving accuracy.

[0025] 3. This kind of measuring reference and aiming reference automatic calibration three-dimensional measuring machine, through the setting of matching slideways, not only realizes the easy disassembly of the operating rod, but also can drive the transmission wheel by rotating the operating rod.

[0026] 4. This kind of measuring reference and aiming reference automatically calibrates the three-dimensional coordinate measuring machine. The direction of the fixed socket is determined by the coordinated use of the positioning hole and the positioning block, so that the fixed socket can be aligned with the fixed plug rod. The sliding cover can be pushed by the standard part, so it will not hinder the fixation of the standard part. After the standard part is taken out, the sliding cover rises due to the elastic force of the reset spring and covers the guide through hole, which can effectively prevent paper scraps, hair and other debris from entering the guide through hole. The sliding cover is fixed by a ring magnet, which can effectively prevent the sliding cover from falling due to gravity.

[0027] 5. This type of measuring reference and aiming reference automatically calibrates the three-dimensional coordinate measuring machine. It uses a T-shaped support ring and an annular support plate to support the transmission wheel, which is beneficial to the rotation of the transmission wheel. There is rolling friction between the roller and the transmission wheel, which can make the transmission wheel rotate more smoothly.

[0028] 6. This type of measurement reference and aiming reference automatically calibrates the three-dimensional coordinate measuring machine. The position of the laser can be adjusted by adjusting the bracket. The laser can be moved to the side of the measuring table to increase the range of the optical path layout. It can also free up space in front of the measuring table, which is conducive to subsequent measurement of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 It is a structural schematic diagram of a three-coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference of the present invention;

[0031] Figure 2 It is a structural schematic diagram of a three-dimensional coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference (dustproof box and electric switch door are omitted);

[0032] Figure 3 It is a schematic diagram of the structure of the use state of a laser interferometer for automatically calibrating a three-dimensional coordinate measuring machine with a measuring reference and an aiming reference according to the present invention;

[0033] Figure 4 It is a schematic diagram of the disassembly structure of an adjustment bracket for automatically calibrating a three-dimensional coordinate measuring machine for a measuring reference and an aiming reference according to the present invention;

[0034] Figure 5 It is a schematic diagram of the connection structure between a workbench and a standard part of a three-coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference according to the present invention;

[0035] Figure 6 It is a schematic diagram of the structure of the adaptive dustproof component and the standard part used in conjunction with the measuring reference and aiming reference automatic calibration three-dimensional measuring machine of the present invention;

[0036] Figure 7 It is a schematic diagram of the workbench structure of a three-dimensional coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference according to the present invention;

[0037] Figure 8 It is a schematic diagram of the connection structure between a fixing mechanism and a base of a three-dimensional coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference of the present invention;

[0038] Fig. 9 It is a schematic diagram of the base structure of a three-dimensional coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference according to the present invention;

[0039] Fig.10 It is a schematic diagram of the connection structure of a fixing mechanism and an annular support assembly for automatically calibrating a three-dimensional coordinate measuring machine for a measuring reference and an aiming reference according to the present invention;

[0040] Fig.11 It is a schematic diagram of the structure of a transmission wheel of a three-dimensional coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference according to the present invention;

[0041] Fig.12 It is a schematic structural diagram of an annular support assembly for automatically calibrating a three-dimensional coordinate measuring machine for a measuring reference and an aiming reference according to the present invention;

[0042] Fig.13 It is a schematic diagram of the connection structure between a transmission body and a sector gear of a three-dimensional coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference of the present invention;

[0043] Fig.14 It is a schematic diagram of the structure of an operating lever of a three-dimensional coordinate measuring machine for automatic calibration of a measuring reference and an aiming reference according to the present invention;

[0044] Fig.15 The invention discloses a structural schematic diagram of an adaptive dustproof component for automatically calibrating a three-dimensional coordinate measuring machine with a measuring reference and an aiming reference.

[0045] In the figure: 001, standard parts; 1, measuring table; 2, adjusting guide rail; 21, bearing bracket; 22, transmission plate; 23, dustproof box; 24, electric switch door; 3, driving mechanism; 4, probe assembly; 5, laser interferometer; 51, laser; 52, interferometer group; 53, reflector group; 6, fixing mechanism; 61, support frame; 62, transmission wheel; 621, matching hole; 622, meshing tooth; 623, rotating groove; 63, hemispherical head; 64, metal spring; 65, fixed plug rod; 66, transmission body; 661, sliding ring groove; 662, arc groove; 663, guide groove ; 67. Fan gear; 68. Operating lever; 681. Matching slider; 7. Adjustment bracket; 71. Support frame; 72. Concave slide seat; 73. Support plate; 74. Sliding seat; 75. Support guide rail; 8. Workbench; 81. Base; 82. Top cover; 83. Guide through hole; 84. Avoidance groove; 9. Annular support assembly; 91. T-shaped support ring; 92. Roller; 93. Annular support plate; 10. Adaptive dustproof assembly; 101. Support end cover; 102. Connecting screw; 103. Reset spring; 104. Positioning piece; 105. Sliding cover; 106. Annular magnet. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0047] Example: Figure 1-Figure 3 and Figure 5-Figure 10 As shown, the present invention is a three-dimensional coordinate measuring machine for automatic calibration of measurement datum and aiming datum, comprising a measuring platform 1, an adjustment bracket 7 is provided on one side of the measuring platform 1, and an adjustment guide rail 2 is provided at the rear of the measuring platform 1;

[0048] A workbench 8 driven by the adjustment rail 2 is arranged on the top of the measuring table 1, and the workbench 8 includes a base 81, a top cover 82 installed on the top of the base 81, and four guide through holes 83 penetrating the base 81 and the top cover 82. The base 81 and the top cover 82 are also provided with mounting grooves;

[0049] A fixing mechanism 6 for fixing the standard part 001 is arranged in the mounting groove of the base 81, the fixing mechanism 6 comprises a transmission body 66 rotatably connected to the base 81 and a transmission wheel 62 arranged outside the transmission body 66, the transmission wheel 62 is rotatably connected to the base 81 via an annular support assembly 9;

[0050] An adaptive dustproof assembly 10 for blocking the guide through hole 83;

[0051] A driving mechanism 3 disposed outside the measuring platform 1 and a probe assembly 4 installed at the moving end of the driving mechanism 3;

[0052] The laser interferometer 5 is used to measure the position of the workbench 8 and send the data to the embedded control and data processing system.

[0053] Specifically, a center hole is formed on the top cover 82 to allow the transmission body 66 to pass through, and the center hole is used to install the transmission body 66 .

[0054] Among them, Figure 8 , Fig.10 , Fig.11 , Fig.13 and Fig.14 As shown, the fixing mechanism 6 also includes a support frame 61 that fits with the inner wall of the mounting groove on the base 81 and an operating rod 68 used in conjunction with the transmission body 66. The support frame 61 is provided with four avoidance openings distributed in a rectangular shape, and a metal spring 64 is provided on one side of the avoidance opening. A fixed plug rod 65 that can be plugged into the fixed socket on the standard part 001 is penetrated by the metal spring 64, and a hemispherical head 63 is provided at one end of the fixed plug rod 65. A standard ball for calibration is provided at the upper end of the operating rod 68, and a matching slider 681 is symmetrically provided on the outer wall of the lower end. The avoidance opening can avoid the metal spring 64, providing space for the deformation of the metal spring 64.

[0055] Among them, at least one matching hole 621 that can match with the hemispherical head 63 is provided on the outer wall of the transmission wheel 62, a rotating groove 623 is provided on the transmission wheel 62, and a plurality of meshing teeth 622 are also provided on the inner wall of the transmission wheel 62. When the transmission wheel 62 rotates to the position of the hemispherical head 63 with the matching hole 621, the transmission wheel 62 no longer resists the hemispherical head 63, and the hemispherical head 63 will use the elastic force of the metal spring sheet 64 itself to drive the fixed plug 65 out of the fixed plug; the meshing transmission between the fan gear 67 and the meshing tooth 622 enables the operating rod 68 to drive the transmission wheel 62 to a certain angle every time it rotates one circle; only one matching hole 621 can be set, and the standard parts 001 can be fixed one by one.

[0056] The outer wall of the transmission body 66 is sleeved and fixed with a sector gear 67 meshing with the meshing teeth 622. The top of the transmission body 66 is also provided with a receiving groove that cooperates with the operating rod 68. The outside of the receiving groove is connected to a matching slideway used in conjunction with the matching slider 681. The matching slideway includes a sliding ring groove 661. One side of the sliding ring groove 661 is provided with two symmetrically distributed arc grooves 662. Both ends of the arc groove 662 are connected with guide grooves 663, one of which is connected to the sliding ring groove 661. The operating rod is controlled. 68. After the matching slider 681 enters the sliding ring groove 661 through the guide groove 663 connected to the sliding ring groove 661, the operating rod 68 and the transmission body 66 are rotationally matched, so when the operating rod 68 is rotated, the transmission body 66 will not rotate along with it, avoiding the rotation of the transmission body 66 due to accidental touching of the operating rod 68; after the matching slider 681 enters the guide groove 663 that is not connected to the sliding ring groove 661, if the operating rod 68 is lifted up, the operating rod 68 can be removed, and if the operating rod 68 continues to be rotated, the transmission body 66 can be driven to rotate together.

[0057] The transmission body 66 is driven by operating the operating lever 68. The rotating transmission body 66 drives the sector gear 67. The meshing transmission between the sector gear 67 and the meshing tooth 622 drives the transmission wheel 62. The transmission wheel 62 presses the hemispherical head 63 to deform the metal spring 64. The hemispherical head 63 drives the fixing rod 65 to insert into the fixing socket to complete the fixing of the standard part 001. Multiple standard parts 001 of different heights can be fixed on the workbench 8 for calibration, which is beneficial to improve accuracy.

[0058] Specifically, indicator grooves are provided on the top of the transmission body 66 and the outer wall of the operating rod 68. The indicator groove on the operating rod 68 is used to indicate the position of the matching slider 681, which can facilitate the user to determine the position of the matching slider 681. The indicator groove on the transmission body 66 is used to indicate the position of the guide groove 663 connected to the sliding ring groove 661, which is beneficial for the user to determine the rotation direction of the operating rod 68.

[0059] Among them, Figure 8 and Fig. 9 As shown, four avoidance grooves 84 distributed in a rectangular shape are connected outside the installation groove on the base 81. The avoidance grooves 84 are connected to the guide through hole 83 through a connecting hole that slides with the fixed plug rod 65. The avoidance grooves 84 cooperate with the avoidance opening to provide space for the deformation of the metal spring 64.

[0060] Among them, Figure 6 , Fig.10 and Fig.15As shown, the adaptive dustproof assembly 10 includes a support end cover 101 located at the bottom of the base 81 and coaxial with the axis of the guide through hole 83, a sliding cover 105 slidably arranged in the guide through hole 83, and a positioning member 104 embedded in the top of the top cover 82 and coaxial with the axis of the guide through hole 83. The bottom of the positioning member 104 is symmetrically provided with an annular magnet 106. The support end cover 101 is connected to the positioning member 104 via a connecting screw 102. The support end cover 101 is also connected to the sliding cover 105 via a reset spring 103, and the top of the sliding cover 105 is provided with A positioning block that can match the positioning hole at the bottom of the standard part 001, an extension plate that can be magnetically connected to the annular magnet 106 is provided on the outer wall of the sliding cover 105, and a mounting hole that can accommodate the connecting screw 102 is opened on the extension plate. The extension plate can be made of magnetic material, or the magnet ring can be embedded in the extension plate; the direction of the fixed socket is determined by the coordinated use of the positioning hole and the positioning block, so that the fixed socket can be aligned with the fixed plug rod 65; the use of the annular magnet 106 to fix the sliding cover 105 can effectively prevent the sliding cover 105 from falling due to gravity.

[0061] With the help of the positioning hole and the positioning block, the standard part 001 is positioned, and then the standard part 001 is pressed down to push the sliding cover 105 downward to compress the return spring 103 until the sliding cover 105 moves to the lowest point, and the fixed socket will be aligned with the fixed plug rod 65. After the standard part 001 is taken out, the sliding cover 105 rises due to the elastic force of the return spring 103, covering the guide hole 83, which can effectively prevent paper scraps, hair and other debris from entering the guide hole 83.

[0062] In addition, if Figure 5 and Figure 6 As shown, standard part 001 consists of a support body into which positioning part 104 can be inserted and a standard ball arranged on the top of the support body. The fixed socket should be opened on the lower outer wall of the support body, and the positioning hole should be opened at the bottom of the support body. The standard ball can also be replaced by a gauge block, a ring gauge, etc.

[0063] Among them, Fig.10 and Fig.12 As shown, the annular support assembly 9 includes a T-shaped support ring 91 rotatably matched with the rotating groove 623, and a plurality of rollers 92 rotatably arranged on the T-shaped support ring 91 and rolling matched with the rotating groove 623. An annular support plate 93 connected to the base 81 is provided at the bottom of the T-shaped support ring 91. The T-shaped support ring 91 and the annular support plate 93 are used to support the transmission wheel 62, which is beneficial to the rotation of the transmission wheel 62. There is rolling friction between the rollers 92 and the transmission wheel 62, which can make the transmission wheel 62 rotate more smoothly.

[0064] Among them, Figure 1-Figure 4As shown, the adjustment bracket 7 includes a support rail 75, a sliding seat 74 slidably matched with the support rail 75, and a support bracket 71 rotatably arranged on the top of the sliding seat 74, the inner side of the sliding seat 74 is symmetrically provided with rollers rollingly matched with the support rail 75, and the top of the support bracket 71 is provided with a support plate 73, and the inner side of the support bracket 71 is also slidably provided with a concave sliding seat 72 connected to the support plate 73, and the top of the support plate 73 is screwed with a locking bolt. By loosening the locking bolt, the position of the support plate 73 and the concave sliding seat 72 can be adjusted, so that the position of the laser 51 can be adjusted. Since the support bracket 71 is rotatably connected to the sliding seat 74, not only the position of the laser 51 can be adjusted, the laser 51 can be moved to the side of the measuring platform 1 to increase the range of the optical path layout, but also the space in front of the measuring platform 1 can be vacated, which is conducive to the subsequent measurement of the product.

[0065] Among them, Figure 1-Figure 3 As shown, the laser interferometer 5 is composed of a laser 51 installed on the top of the support plate 73 through an adjustable pan-tilt platform, an interferometer group 52 for dividing the laser beam emitted by the laser 51 into a reference beam and a measuring beam, a reflector group 53 for reflecting the light, and a plurality of environmental sensors arranged on the workbench 8. The interferometer group 52 is fixed to the top of the measuring table 1 through a supporting structure 1, and the reflector group 53 is fixed to the base 81 through a supporting structure 2. When not in use, the environmental sensor, the interferometer group 52 and the reflector group 53 can all be stored in the storage cabinet; the environmental sensor is used to collect environmental parameters in real time and compensate for the influence of air refractive index and thermal expansion to realize the position measurement of the workbench 8, and the measured position is sent to the embedded control and data processing system, which is conducive to the automatic aiming of the probe at the standard ball.

[0066] Among them, Figure 1-Figure 3 As shown, a bearing bracket 21 is provided on the top of the movable body of the adjusting guide rail 2, and a transmission plate 22 is installed on the top of the bearing bracket 21. One end of the transmission plate 22 is connected to the base 81 through a connecting member, and a dustproof box 23 is also provided outside the adjusting guide rail 2. An electric switch door 24 is provided at the outlet of the dustproof box 23. The position of the workbench 8 is adjusted by adjusting the guide rail 2, which can drive the standard part 001 to move. There is no need to repeatedly install and remove the standard part 001, which can make the calibration work more convenient, save labor and time, and improve efficiency. The adjusting guide rail 2 can bring the workbench 8 into the dustproof box 23. After closing the electric switch door 24, it can effectively prevent dust, hair, etc. from falling on the standard ball.

[0067] During operation, the standard part 001 is positioned by using the positioning hole and the positioning block, and then the standard part 001 is pressed down to push the sliding cover 105 downward to compress the reset spring 103 until the sliding cover 105 moves to the lowest point, and the fixed socket will be aligned with the fixed plug rod 65, and then the transmission body 66 is driven by operating the operating lever 68, and the rotating transmission body 66 drives the sector gear 67, and the sector gear 67 is meshed with the meshing teeth 622 to drive the transmission wheel 62, and the transmission wheel 62 presses the hemispherical head 63 to deform the metal spring 64, and the hemispherical head 63 will drive the fixed plug rod 65 to insert into the fixed socket to complete the fixation of the standard part 001;

[0068] When calibration is required, the electric switch door 24 is opened, and the workbench 8 is driven by the adjustment guide rail 2 to move to the measurement area. The workbench 8 and the standard part 001 installed thereon are also moved to the measurement area. The position measurement of the workbench 8 is achieved by using environmental sensors to collect environmental parameters in real time and compensate for the influence of air refractive index and thermal expansion. The measured position is sent to the embedded control and data processing system, and an instruction is sent to the drive mechanism 3 through the embedded control and data processing system. The drive mechanism 3 drives the probe assembly 4, so that the probe automatically aims at the standard ball and performs measurement. The measured data is transmitted to the embedded control and data processing system and compared with the input data of the standard ball.

[0069] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A three-dimensional coordinate measuring machine for automatic calibration of measurement datum and aiming datum, characterized in that: include: A measuring platform (1), wherein an adjustment bracket (7) is provided on one side of the measuring platform (1), and an adjustment guide rail (2) is provided at the rear of the measuring platform (1); A workbench (8) is arranged on the top of the measuring table (1) and is driven by an adjustment guide rail (2), the workbench (8) comprising a base (81), a top cover (82) mounted on the top of the base (81), and four guide through holes (83) extending through the base (81) and the top cover (82), and the base (81) and the top cover (82) are also provided with mounting grooves; A fixing mechanism (6) for fixing the standard component (001) is arranged in the installation groove of the base (81), the fixing mechanism (6) comprising a transmission body (66) rotatably connected to the base (81) and a transmission wheel (62) arranged outside the transmission body (66), the transmission wheel (62) being rotatably connected to the base (81) via an annular support assembly (9); The fixing mechanism (6) further comprises a support frame (61) fitted with the inner wall of the mounting groove on the base (81) and an operating rod (68) used in conjunction with the transmission body (66); the support frame (61) is provided with four avoidance openings distributed in a rectangular shape; a metal spring sheet (64) is provided on one side of the avoidance opening; a fixed plug rod (65) capable of being plugged into a fixed plug hole on the standard part (001) is provided through the metal spring sheet (64); a hemispherical head (63) is provided at one end of the fixed plug rod (65); a standard ball for calibration is provided at the upper end of the operating rod (68); and a matching slider (681) is symmetrically provided on the outer wall of the lower end; At least one matching hole (621) capable of matching with the hemispherical head (63) is formed on the outer wall of the transmission wheel (62), a rotation groove (623) is formed on the transmission wheel (62), and a plurality of meshing teeth (622) are also provided on the inner wall of the transmission wheel (62); A sector gear (67) meshing with the meshing teeth (622) is sleeved and fixed on the outer wall of the transmission body (66), and a receiving groove cooperating with the operating rod (68) is also provided on the top of the transmission body (66), and a matching slideway cooperating with the matching slider (681) is provided outside the receiving groove, and the matching slideway includes a sliding ring groove (661), and two symmetrically distributed arc grooves (662) are provided on one side of the sliding ring groove (661), and guide grooves (663) are provided at both ends of the arc groove (662), and one of the guide grooves (663) is connected to the sliding ring groove (661); An adaptive dust-proof component (10) for blocking the guide through hole (83); A driving mechanism (3) disposed outside the measuring platform (1) and a probe assembly (4) mounted at the moving end of the driving mechanism (3); A laser interferometer (5) is used to measure the position of the workbench (8) and send the data to the embedded control and data processing system.

2. A three-dimensional coordinate measuring machine for automatic calibration of measurement datum and aiming datum according to claim 1, characterized in that: The adaptive dustproof component (10) comprises a support end cover (101) located at the bottom of the base (81) and coaxial with the axis of the guide through hole (83), a sliding cover (105) slidably arranged in the guide through hole (83), and a positioning member (104) embedded in the top of the top cover (82) and coaxial with the axis of the guide through hole (83), wherein an annular magnet (106) is symmetrically arranged at the bottom of the positioning member (104), the support end cover (101) is connected to the positioning member (104) via a connecting screw (102), the support end cover (101) is also connected to the sliding cover (105) via a reset spring (103), and a positioning block capable of matching the positioning hole at the bottom of the standard part (001) is arranged at the top of the sliding cover (105), and an extension plate capable of magnetically connecting with the annular magnet (106) is arranged on the outer wall of the sliding cover (105), and a mounting hole capable of allowing the connecting screw (102) to pass through is opened on the extension plate.

3. The three-dimensional coordinate measuring machine for automatic calibration of the measuring reference and the aiming reference according to claim 1, characterized in that: The annular support assembly (9) comprises a T-shaped support ring (91) rotatably engaged with the rotating groove (623); a plurality of rollers (92) rotatably arranged on the T-shaped support ring (91) and rollingly engaged with the rotating groove (623); and an annular support plate (93) connected to the base (81) is arranged at the bottom of the T-shaped support ring (91).

4. A three-dimensional coordinate measuring machine for automatic calibration of measurement datum and aiming datum according to claim 1, characterized in that: The adjustment bracket (7) comprises a support rail (75), a sliding seat (74) slidably matched with the support rail (75), and a support frame (71) rotatably arranged on the top of the sliding seat (74), the inner side of the sliding seat (74) is symmetrically provided with rollers that roll with the support rail (75), the top of the support frame (71) is provided with a support plate (73), the inner side of the support frame (71) is also slidably provided with a concave sliding seat (72) connected to the support plate (73), and the top of the support plate (73) is screwed with a locking bolt.

5. The three-dimensional coordinate measuring machine for automatic calibration of measurement datum and aiming datum according to claim 1, characterized in that: The laser interferometer (5) comprises a laser (51) mounted on the top of a support plate (73) via an adjustable pan-tilt platform, an interference mirror group (52) for dividing a laser beam emitted by the laser (51) into a reference beam and a measurement beam, a reflection mirror group (53) for reflecting light, and a plurality of environmental sensors arranged on a workbench (8); the interference mirror group (52) is fixed to the top of the measuring platform (1) via a first support structure, and the reflection mirror group (53) is fixed to a base (81) via a second support structure.

6. The three-dimensional coordinate measuring machine for automatic calibration of the measuring reference and the aiming reference according to claim 1, characterized in that: A bearing bracket (21) is provided on the top of the movable body of the adjusting guide rail (2), a transmission plate (22) is installed on the top of the bearing bracket (21), one end of the transmission plate (22) is connected to the base (81) via a connecting member, and a dustproof box (23) is also provided outside the adjusting guide rail (2), and an electric switch door (24) is provided at the outlet of the dustproof box (23).

7. A three-dimensional coordinate measuring machine for automatic calibration of measurement datum and aiming datum according to claim 1, characterized in that: Four avoidance grooves (84) distributed in a rectangular shape are provided outside the installation groove on the base (81), and the avoidance grooves (84) are connected to the guide through hole (83) via a communication hole that is slidably matched with the fixed insertion rod (65).

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