CN116518874A - Gantry type double-line laser measuring head coordinate measuring device - Google Patents
Gantry type double-line laser measuring head coordinate measuring device Download PDFInfo
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- CN116518874A CN116518874A CN202310483110.7A CN202310483110A CN116518874A CN 116518874 A CN116518874 A CN 116518874A CN 202310483110 A CN202310483110 A CN 202310483110A CN 116518874 A CN116518874 A CN 116518874A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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Abstract
The invention discloses a gantry type double-line laser measuring head coordinate measuring device which is used for carrying out precise, complete and rapid three-dimensional coordinate non-contact measurement on complex parts and belongs to the fields of precise measurement technology and part coordinate measurement. According to the invention, two line laser measuring heads are used for synchronous measurement, the two line laser measuring heads are complementary, so that the measurement blind area is reduced, and a symmetrical portal frame unit is adopted, so that the structural rigidity and stability are high, the whole machine has 9 degrees of freedom, the universality is good, the bus measurement range can be promoted by a rotating shaft at the tail end of the device, and the need of moving the measuring heads is avoided. The method can solve the problems that the existing coordinate measurement is low in efficiency and has incomplete information caused by measurement blind areas, and the traditional coordinate measurement device is easily affected by geometric errors of a mechanical shaft, and improves the speed and universality of coordinate measurement.
Description
Technical Field
The device relates to a gantry type double-line laser measuring head coordinate measuring device, and belongs to the fields of precision measurement technology and component coordinate measurement.
Background
Error detection of mechanical parts is an important link in precision manufacturing, and after the mechanical parts are manufactured, coordinate measurement is needed to determine whether the mechanical parts meet the precision level requirement. Taking special-shaped and irregular high-precision mechanical parts as an example, the coordinate measurement precision can reach the micron level, but is limited by the sampling speed, the contact coordinate measurement efficiency is often lower than that of line laser type coordinate measurement, and probe wear usually exists in the contact coordinate measurement. Thus, line laser measurement is a currently popular and important research direction.
The current devices for measuring the coordinates of mechanical parts mainly comprise three types: (1) a three-coordinate measuring device. The contact type three-coordinate measuring instrument has been updated repeatedly from the last century, belongs to a mature contact type measuring device, has the advantages of high measuring precision and strong universality, and has the defects that a measurement dead zone which cannot be contacted is always existed due to the limitation of physical properties such as probe diameter and the like, and the measuring efficiency is lower. As proposed in patent No. cn20221139999. X, the measuring feeler of which needs to be sampled point by moving continuously in contact along the surface of the measured piece, the measuring speed is very limited. (2) a measurement center device. The rotary table is used for measuring axisymmetric parts or parts with a definite central shaft, such as gears, gear machining cutters and crankshafts, and the rotary table also belongs to a contact type measuring device, and has the advantages of improving the measuring efficiency and also has the characteristics of measuring dead zones. As proposed in patent CN202221329993.3, the gear measuring center rotates the measured gear during measurement, and the measuring head only moves away from and approaches the measured gear to perform coordinate measurement, and the measuring speed is higher than that of the three-coordinate measuring machine. (3) The coordinate measuring device based on the line laser measuring head has the advantages that the working mode of the coordinate measuring device belongs to parallel measurement, meanwhile, multipoint sampling is carried out, the device has high efficiency and high precision, for example, the patent CN201822038857.9 proposes a device for detecting by using a laser profilometer, and as the detected part only carries out translational movement in the measuring process, the device can only detect less types of detected parts and lacks versatility; for some more complex mechanical parts, the whole surface cannot be measured by one measurement, and multiple measurements of the probe combined with the movement of the mechanical axis are required, as in the device proposed in patent No. cn201711488436.X, which uses one probe to obtain information of all tooth surfaces in a single measurement of the gear, the movement of the probe is required to measure more comprehensive information, which inevitably introduces geometric errors of the guide rail and the mechanical axis. In summary, the present coordinate measuring device has the disadvantages of low measuring efficiency, poor versatility and susceptibility to geometric errors.
In order to overcome the problems, the gantry type double-line laser measuring head coordinate measuring device disclosed by the invention comprehensively considers the defects of the three measuring modes, and the innovative double-line laser coordinate measuring device adopting gantry type multi-axis synchronous linkage improves the rigidity and stability of the whole machine in the structure of the device, ensures the improvement of the measuring efficiency by utilizing the advantages of the linear structure light measuring speed in design, can overcome the problems of contact type measuring dead zone and shielding of linear laser, and realizes the measurement of mechanical parts with different sizes or shapes.
Disclosure of Invention
The invention is used for solving the problems of low coordinate measurement efficiency, incomplete measurement blind area information and easiness in being influenced by geometric errors of a mechanical shaft, and provides a coordinate measurement device using a double-line laser measuring head, which can efficiently and synchronously finish the measurement of the geometric outline of a mechanical part under the condition of ensuring the measurement precision.
The invention is directed to the problems, and the basic idea is as follows: (1) aiming at the dead zone of the measured piece which cannot be measured by the first bench line laser measuring head, the second bench line laser measuring head is used for synchronously measuring in consideration of the optical measurement angle, so that the measurement efficiency, the measurement precision and the integrity of the information of the parts are improved. (2) The symmetrical double portal frame units are adopted, the device has high structural rigidity and stability and wider measurement range, the whole machine has 9 degrees of freedom, and the device has better measurement universality for standard parts and special-shaped parts. (3) The device is provided with a rotary shaft which rotates around the X axis at the tail end and is used for rotating the line laser measuring head so as to improve the measuring range of the line laser measuring head and avoid the problem of geometrical error introduction caused by repeatedly moving the measuring head in the measuring process.
In order to achieve the above purpose and principle, the technical scheme of the invention is as follows:
the gantry type double-line laser measuring head coordinate measuring device comprises a base unit 1, a gantry bracket unit 2, an X-axis unit 3, a Y-axis unit 4, a double-line laser measuring head unit 5 and a rotary table unit 6, wherein the rotary table unit 6 is respectively fixed above the base unit 1 and used for fixing a measured piece 7 and driving the measured piece to rotate, the gantry bracket unit 2 is fixed above the base unit 1 and used for supporting the X-axis unit 3 above the gantry bracket unit 2, the Y-axis unit 4 is arranged on the X-axis unit 3, the double-line laser measuring head unit 5 is connected with the Y-axis unit 4, and the double-line laser measuring head unit 5 comprises two line laser measuring heads and is used for carrying out three-dimensional coordinate measurement on the measured piece 7;
the base unit 1 includes a base bracket 1.2 and a marble platform 1.1 mounted thereon;
the gantry support unit 2 comprises a gantry support 2.1 and a gantry support 2.2, wherein the gantry support 2.1 and the gantry support 2.2 are symmetrically arranged on the marble platform 1.1, and the combined support of the two gantry supports enables the device to have higher structural rigidity and stability, and four supports of the gantry support 2.1 and the gantry support 2.2 and four supports of the base support 1.2 are distributed on the same vertical shaft;
the X-axis unit 3 is arranged on the gantry support 2.1 and the gantry support 2.2 by four groups of screw rod sliding block mechanisms which are symmetrically distributed, a left X-axis unit 3.1 and a right X-axis unit 3.8 moving part are formed between every two of the four groups of screw rod sliding block mechanisms, wherein a first screw rod sliding block 3.2 and a third screw rod sliding block 3.9 are arranged on the same axis of the upper top end surface of the gantry support 2.1 in a opposite-to-top mode. The axial movement of the first screw slider 3.2 is realized through the positive and negative rotation of the first screw motor 3.3, and the full-closed loop control of the first screw slider 3.2 is realized by combining the real-time accurate feedback displacement data of the first grating 3.6. The axial movement of the second screw slider 3.4 is realized through the positive and negative rotation of the second screw motor 3.5, and the full-closed loop control of the second screw slider 3.4 is realized by combining the real-time accurate feedback displacement data of the second grating 3.7;
similarly, the screw rod sliding block III 3.9 and the screw rod sliding block IV 3.11 are arranged on the same axis of the upper top end surface of the gantry bracket 2.2 in a opposite-top direction. The axial movement of the screw rod sliding block III.9 is realized through the positive and negative rotation of the screw rod motor III.10, and the full-closed loop control of the screw rod sliding block III.9 is realized by combining the real-time accurate feedback displacement data of the grating III.13. The axial movement of the screw rod sliding block IV 3.11 is realized through the positive and negative rotation of the screw rod motor IV 3.12, and the full closed loop control of the screw rod sliding block IV 3.11 is realized by combining the real-time accurate feedback displacement data of the grating IV 3.14;
the X-axis unit 3 has two degrees of freedom, one degree of freedom of movement being provided by the left X-axis unit 3.1 and the right X-axis unit 3.8 moving parts, respectively. The left X-axis unit 3.1 consists of a first screw rod sliding block 3.2 and a second screw rod sliding block 3.4, and the two groups of screw rod sliding block mechanisms are independently driven to reversely adjust parallel errors caused by inconsistent displacements at two sides. The right X-axis unit 3.8 consists of a screw rod sliding block III 3.9 and a screw rod sliding block IV 3.11, and the two groups of screw rod sliding block mechanisms are independently driven to reversely adjust parallel errors caused by inconsistent displacements at two sides;
the Y-axis unit 4 comprises two groups of screw rod slide block mechanisms which are arranged on a first beam 4.1 and a second beam 4.6, wherein a screw rod slide block five 4.2 is arranged on the first beam 4.1, a screw rod slide block six 4.7 is arranged on the second beam 4.6, one end of the first beam 4.1 is arranged on the first screw rod slide block 3.2, the other end of the first beam is arranged on the second screw rod slide block 3.4, the axial movement of the screw rod slide block five 4.2 is realized through the positive and negative rotation of a screw rod motor five 4.3, and the full-closed loop control of the screw rod slide block five 4.2 is realized by combining the real-time accurate feedback displacement data of a grating five 4.5. A linear guide rail I4.4 is arranged below the cross beam I4.1 and is used for improving the stability of the left Y-axis movement;
similarly, one end of the beam II 4.6 is arranged on the screw rod sliding block III 3.9, the other end of the beam II is arranged on the screw rod sliding block IV 3.11, the axial movement of the screw rod sliding block VI 4.7 is realized through the positive and negative rotation of the screw rod motor VI 4.8, the full-closed loop control of the screw rod sliding block VI 4.7 is realized by combining the real-time accurate feedback displacement data of the grating VI 4.10, and the linear guide rail II 4.9 is arranged below the beam II 4.6 and used for improving the stability of the movement of the right Y axis;
the Y-axis unit 4 has two degrees of freedom, and one degree of freedom of movement is provided by a screw rod sliding block five 4.2 and a screw rod sliding block six 4.7 respectively;
the double-line laser measuring head unit 5 module comprises a first vertical frame 5.1 and a second vertical frame 5.9, wherein the first vertical frame 5.1 is arranged on a screw rod sliding block five 4.2 and a linear guide rail one 4.4, and the first vertical frame 5.1 can move along a Y axis; the axial movement of the screw rod slide block seven 5.2 is realized through the positive and negative rotation of the screw rod motor seven 5.3, and the full-closed loop control of the screw rod slide block seven 5.2 is realized by combining the real-time accurate feedback displacement data of the grating seven 5.4. A motor frame connecting piece I5.5 is arranged on the screw rod sliding block seven 5.2 and used for positioning and installing a motor I5.6 for tilting, an output shaft of the motor I5.6 for tilting is rigidly connected with a rotary measuring head frame I5.7, the measuring head frame I5.7 is used for fixing a line laser measuring head I5.8, the motor I5.6 for tilting can enable the line laser measuring head I5.8 to rotate along the X axis direction, the rotary shaft can control the longitudinal measuring range of the line laser measuring head I5.8, and the need of moving the measuring head can be avoided;
similarly, the second vertical frame 5.9 is arranged on the sixth screw rod sliding block 4.7 and the second linear guide rail 4.9, and the second vertical frame 5.9 can move along the Y axis; the axial movement of the screw rod slide block eight 5.10 is realized through the positive and negative rotation of the screw rod motor eight 5.11, and the full-closed loop control of the screw rod slide block eight 5.10 is realized by combining the real-time accurate feedback displacement data of the grating eight 5.12. A motor frame connecting piece II 5.13 is arranged on the screw rod slide block eight 5.10 and is used for positioning and installing a motor II 5.14 for tilting, an output shaft of the motor II 5.14 for tilting is rigidly connected with a rotary measuring head frame II 5.15, the measuring head frame II 5.15 is used for fixing a line laser measuring head II 5.16, the motor II 5.14 for tilting can enable the line laser measuring head II 5.16 to rotate along the X axis direction, the measuring ranges of the line laser measuring head II 5.16 and the line laser measuring head I5.8 are complemented, measuring blind areas are reduced, and accordingly the integrity of measured data is improved;
the double-line laser measuring head unit 5 has two degrees of freedom of movement, which are provided by a screw slider seven 5.2 and a screw slider eight 5.10, and two degrees of freedom of rotation, which are provided by a motor one for tilting 5.6 and a motor two for tilting 5.14;
the turntable unit 6 module comprises a turntable 6.1 and a three-jaw chuck 6.2, wherein the turntable 6.1 is arranged on the marble platform 1.1, the three-jaw chuck 6.2 is arranged on the turntable 6.1 and used as a placing table of a tested piece, and the turntable unit 6 has one degree of freedom in rotation and is provided by the turntable 6.1;
the first line laser measuring head 5.8 in the double line laser measuring head unit 5 module can linearly move along the X axis, the Y axis and the Z axis and can rotate around the X axis, the second line laser measuring head 5.16 can linearly move along the X axis, the Y axis and the Z axis and can rotate around the X axis, the turntable has one degree of freedom, and the whole machine has 9 degrees of freedom;
the beneficial effects of the invention are as follows:
1. the device adopts the double-line laser measuring head to carry out coordinate measurement, can acquire the surface data of the side piece from different directions, and the measurement ranges of the two line laser measuring heads complement each other to reduce the measurement blind area, thereby improving the integrity of the measurement data and having better measurement universality for the measured parts with various sizes and shapes.
2. The device is supported by adopting symmetrical double portal frame units, and has high structural rigidity and stability.
3. The device has 9 degrees of freedom, wherein each double-line laser measuring head has 4 degrees of freedom, and the device can find the proper position and posture which accord with optical measurement before measurement, so that the measurement accuracy can be improved.
4. The longitudinal measuring range of the linear structure optical measuring head is improved through the rotation mode of the tail end of the z axis, and the zero three-dimensional coordinate can be completely obtained under the condition of not moving the measuring head by combining the axial rotation of the turntable, so that the problem that geometrical errors are caused by movement of multiple groups of axes can be avoided, and the measuring precision of the whole machine is improved.
Drawings
FIG. 1 is a diagram of the whole machine of a gantry type double-line laser gauge head coordinate measuring device;
FIG. 2 is a double gantry unit diagram;
FIG. 3 is a top view of a dual gantry unit;
FIG. 4 left hand line laser gauge head unit diagram;
FIG. 5 right side line laser gauge head unit diagram;
FIG. 6 is a schematic diagram of three-dimensional coordinate measurement of a gear;
FIG. 7 is a flow chart of the use of a gantry type two-wire laser gauge head coordinate measuring device;
the reference numerals in the figures are: 1-base, 2-gantry support, 3-X axis unit, 4-Y axis unit, 5-dual laser probe unit, 6-turntable unit, 1.1-marble Dan Pingtai, 1.2-base support, 2.1-gantry support, 2.2-gantry support, 3.1-left X axis, 3.2-lead screw first, 3.3-lead screw first motor, 3.4-lead screw second motor, 3.5-lead screw second motor, 3.6-grating first, 3.7-grating second, 3.8-right X axis, 3.9-lead screw third motor, 3.10-lead screw third motor, 3.11-lead screw fourth motor, 3.12-lead screw fourth motor, 3.13-grating third motor, 3.14-grating fourth, 4.1-beam first, 4.2-lead screw fifth motor, 4.3-lead screw fifth motor, 4.4-linear guide first, fourth grating fourth motor the four-dimensional optical imaging device comprises a first 4.5-grating, a second 4.6-beam, a sixth 4.7-lead screw slider, a sixth 4.8-lead screw motor, a second 4.9-linear guide rail, a sixth 4.10-grating, a first 5.1-vertical frame, a seventh 5.2-lead screw slider, a seventh 5.3-lead screw motor, a seventh 5.4-grating, a first 5.5-motor frame connector, a first 5.6-tilting motor, a first 5.7-measuring head frame, a first 5.8-line laser measuring head, a second 5.9-vertical frame, a eighth 5.10-lead screw slider, a eighth 5.11-lead screw motor, a eighth 5.12-grating, a second 5.13-motor frame connector, a second 5.14-tilting motor, a second 5.15-measuring head frame, a second 5.16-line laser measuring head, a second 6.1-turntable, a 6.2-three-jaw chuck and a 7-measured piece.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
Examples: the spur gear with 225mm pitch circle diameter, 3mm modulus, 231mm top circle diameter and 217mm bottom circle diameter was measured.
As shown in fig. 1 and 6, a gantry type double-line laser measuring head coordinate measuring device is composed of a base unit 1, a gantry bracket unit 2, an X-axis unit 3, a Y-axis unit 4, a double-line laser measuring head unit 5 and a turntable unit 6, wherein the turntable unit 6 is respectively fixed above the base unit 1 and is used for fixing a measured piece 7 and driving the measured piece to rotate, the gantry bracket unit 2 is fixed above the base unit 1 and is used for supporting the X-axis unit 3 above the gantry bracket unit 2, the Y-axis unit 4 is arranged on the X-axis unit 3, the double-line laser measuring head unit 5 is connected with the Y-axis unit 4, and the double-line laser measuring head unit 5 comprises two line laser measuring heads and is used for carrying out three-dimensional coordinate measurement on the measured piece 7.
As shown in fig. 1, the base unit 1 includes a base bracket 1.2 and a marble platform 1.1 mounted thereon.
As shown in fig. 2, the gantry support unit 2 includes a gantry support 2.1 and a gantry support 2.2, where the gantry support 2.1 and the gantry support 2.2 are symmetrically installed on the marble platform 1.1, and the common support of the two gantry supports makes the device have higher structural rigidity and stability, and the four supports of the gantry support 2.1 and the gantry support 2.2 and the four supports of the base support 1.2 are distributed on the same vertical shaft.
As shown in fig. 2 and 3, the X-axis unit 3 is mounted on the gantry support 2.1 and the gantry support 2.2 by four groups of symmetrically distributed screw rod slide block mechanisms, and the four groups of screw rod slide block mechanisms form a left X-axis unit 3.1 and a right X-axis unit 3.8 moving part between each two, wherein a first screw rod slide block 3.2 and a third screw rod slide block 3.9 are mounted on the same axis of the upper top end surface of the gantry support 2.1 in a opposite-top-to-top manner. The axial movement of the first screw slider 3.2 is realized through the positive and negative rotation of the first screw motor 3.3, and the full-closed loop control of the first screw slider 3.2 is realized by combining the real-time accurate feedback displacement data of the first grating 3.6. The axial movement of the second screw slider 3.4 is realized through the positive and negative rotation of the second screw motor 3.5, and the full-closed loop control of the second screw slider 3.4 is realized by combining the real-time accurate feedback displacement data of the second grating 3.7;
similarly, the screw rod sliding block III 3.9 and the screw rod sliding block IV 3.11 are arranged on the same axis of the upper top end surface of the gantry bracket 2.2 in a opposite-top direction. The axial movement of the screw rod sliding block III.9 is realized through the positive and negative rotation of the screw rod motor III.10, and the full-closed loop control of the screw rod sliding block III.9 is realized by combining the real-time accurate feedback displacement data of the grating III.13. The axial movement of the screw rod sliding block IV 3.11 is realized through the positive and negative rotation of the screw rod motor IV 3.12, and the full closed loop control of the screw rod sliding block IV 3.11 is realized by combining the real-time accurate feedback displacement data of the grating IV 3.14.
The X-axis unit 3 has two degrees of freedom, one degree of freedom of movement being provided by the left X-axis unit 3.1 and the right X-axis unit 3.8 moving parts, respectively. The left X-axis unit 3.1 consists of a first screw rod sliding block 3.2 and a second screw rod sliding block 3.4, and the two groups of screw rod sliding block mechanisms are independently driven to reversely adjust parallel errors caused by inconsistent displacements at two sides. The right X-axis unit 3.8 consists of a screw rod sliding block III 3.9 and a screw rod sliding block IV 3.11, and the two groups of screw rod sliding block mechanisms are independently driven to reversely adjust parallel errors caused by inconsistent displacements at two sides.
As shown in fig. 2 and 3, the Y-axis unit 4 includes two sets of screw slider mechanisms mounted on the first beam 4.1 and the second beam 4.6, wherein the fifth screw slider 4.2 is mounted on the first beam 4.1, the sixth screw slider 4.7 is mounted on the second beam 4.6, one end of the first beam 4.1 is mounted on the first screw slider 3.2, the other end is mounted on the second screw slider 3.4, the axial movement of the fifth screw slider 4.2 is realized through the forward and reverse rotation of the fifth screw motor five 4.3, and the full-closed loop control of the fifth screw slider 4.2 is realized by combining the real-time accurate feedback displacement data of the fifth grating five 4.5. A linear guide rail I4.4 is arranged below the cross beam I4.1 and is used for improving the stability of the left Y-axis movement;
similarly, one end of the beam II 4.6 is installed on the screw rod sliding block III 3.9, the other end of the beam II is installed on the screw rod sliding block IV 3.11, axial movement of the screw rod sliding block VI 4.7 is achieved through positive and negative rotation of the screw rod motor VI 4.8, full-closed loop control of the screw rod sliding block VI 4.7 is achieved by combining with real-time accurate feedback displacement data of the grating VI 4.10, and a linear guide rail II 4.9 is arranged below the beam II 4.6 and used for improving stability of right Y-axis movement.
As shown in fig. 4 and 5, the two-wire laser gauge head unit 5 module includes a first vertical frame 5.1 and a second vertical frame 5.9, the first vertical frame 5.1 is disposed on a fifth screw slider 4.2 and a first linear guide rail 4.4, and the first vertical frame 5.1 is movable along a Y axis; the axial movement of the screw rod slide block seven 5.2 is realized through the positive and negative rotation of the screw rod motor seven 5.3, and the full-closed loop control of the screw rod slide block seven 5.2 is realized by combining the real-time accurate feedback displacement data of the grating seven 5.4. A motor frame connecting piece I5.5 is arranged on the screw rod sliding block seven 5.2 and used for positioning and installing a motor I5.6 for tilting, an output shaft of the motor I5.6 for tilting is rigidly connected with a rotary measuring head frame I5.7, the measuring head frame I5.7 is used for fixing a line laser measuring head I5.8, the motor I5.6 for tilting can enable the line laser measuring head I5.8 to rotate along the X axis direction, the rotary shaft can control the longitudinal measuring range of the line laser measuring head I5.8, and the need of moving the measuring head can be avoided;
similarly, the second vertical frame 5.9 is arranged on the sixth screw rod sliding block 4.7 and the second linear guide rail 4.9, and the second vertical frame 5.9 can move along the Y axis; the axial movement of the screw rod slide block eight 5.10 is realized through the positive and negative rotation of the screw rod motor eight 5.11, and the full-closed loop control of the screw rod slide block eight 5.10 is realized by combining the real-time accurate feedback displacement data of the grating eight 5.12. The screw rod slide block eight 5.10 is provided with a motor frame connecting piece II 5.13 for positioning and installing a motor II 5.14 for tilting, an output shaft of the motor II 5.14 for tilting is rigidly connected with a rotary measuring head frame II 5.15, the measuring head frame II 5.15 is used for fixing a line laser measuring head II 5.16, the motor II 5.14 for tilting can enable the line laser measuring head II 5.16 to rotate along the X axis direction, the measuring ranges of the line laser measuring head II 5.16 and the line laser measuring head I5.8 are complementary, measuring blind areas are reduced, and accordingly the integrity of measured data is improved.
As shown in fig. 6, the turntable unit 6 module includes a turntable 6.1 and a three-jaw chuck 6.2, the turntable 6.1 is provided on the marble table 1.1, and the three-jaw chuck 6.2 is provided on the turntable 6.1 for serving as a placing table for a measured object, and the turntable unit 6 has one degree of freedom of rotation provided by the turntable 6.1.
The first step: as shown in fig. 7, the measurement starts: resetting the grating origin.
All of the first screw slider 3.2, the first grating 3.6, the second screw slider 3.4, the second grating 3.7, the third screw slider 3.9, the third grating 3.13, the fourth screw slider 3.11, the fourth grating 3.14, the fifth screw slider 4.2, the fifth grating 4.5, the sixth screw slider 4.7, the sixth grating 4.10, the seventh screw slider 5.2, the seventh grating 5.4, the eighth screw slider 5.10 and the eighth grating 5.12 are reset to the initial positions.
And a second step of: positioning and clamping the measured piece 7.
The three-jaw chuck 6.2 is used to position and clamp the test piece 7.
And a third step of: the X-axis position is adjusted based on full closed loop control of grating one 3.6 and grating two 3.7.
The first screw motor 3.3 and the second screw motor 3.5 are controlled to rotate to drive the first screw slide block 3.2 and the second screw slide block 3.4 to linearly move, so that the first beam 4.1 arranged on the two screw slide blocks moves in the X-axis direction, the first line laser measuring head 5.8 moves in the X-axis to be close to or far away from the measured piece 7, and the position of the first line laser measuring head 5.8 is adjusted to enable the distance between the first line laser measuring head and the surface of the measured piece 7 to be within the range of 40mm to 80 mm;
similarly, the screw rod motor III 3.10 and the screw rod motor IV 3.12 are controlled to rotate to drive the screw rod sliding block III 3.9 and the screw rod sliding block IV 3.11 to linearly move, so that the beam II 4.6 arranged on the two screw rod sliding blocks moves in the X-axis direction, the line laser measuring head II 5.16 moves in the X-axis to be close to or far away from the measured piece 7, the position of the line laser measuring head II 5.16 is adjusted to enable the distance between the line laser measuring head II and the surface of the measured piece 7 to be within the range of 40mm to 80mm, or the position of the line laser measuring head II 5.16 on the X-axis is symmetrical with the line laser measuring head I5.8.
Fourth step: the Y-axis position is adjusted based on full closed loop control of grating five 4.5 and grating six 4.10.
The screw rod motor five 4.3 is controlled to rotate to drive the screw rod sliding block five 4.2 to linearly move, so that a vertical frame one 5.1 arranged on the screw rod sliding block five 4.2 and a linear guide rail one 4.4 moves in the Y axis direction, the position of a linear laser measuring head one 5.8 on the Y axis is adjusted to realize offset, and the normal plane included angle of laser and a measured piece 7 is smaller than 60 degrees;
similarly, the screw rod motor six 4.8 is controlled to rotate to drive the screw rod sliding block six 4.7 to linearly move, the vertical frame two 5.9 arranged on the screw rod sliding block six 4.7 and the linear guide rail two 4.9 moves in the Y-axis direction, the position of the line laser measuring head two 5.16 on the Y-axis is adjusted to realize offset, and the line laser measuring head two 5.16 on the same position on the Y-axis is enabled to measure the tooth surface on the other side of the measured piece 7.
Fifth step: the Z-axis position is adjusted based on full closed loop control of grating seven 5.4 and grating eight 5.12.
The screw rod motor seven 5.3 is controlled to rotate to drive the screw rod sliding block seven 5.2 to linearly move, so that a motor frame connecting piece I5.5 arranged on the screw rod sliding block seven 5.2 moves in the Z-axis direction, the position of a line laser measuring head I5.8 in the vertical direction is adjusted, and the center of a measuring range of the line laser measuring head I5.8 is aligned with the middle part of the tooth width of a measured piece 7;
similarly, the screw rod motor eight 5.11 is controlled to rotate to drive the screw rod sliding block eight 5.10 to linearly move, so that the motor frame connecting piece II 5.13 arranged on the screw rod sliding block eight 5.10 moves in the Z-axis direction, the position of the line laser measuring head II 5.16 in the vertical direction is adjusted, and the center of the measuring range of the line laser measuring head I5.8 is aligned with the middle part of the tooth width of the measured piece 7 or the position of the line laser measuring head I5.8 in the Z-axis direction is identical.
Sixth step: the line laser tilt angle is adjusted.
Controlling the motor I5.6 to rotate for driving the measuring head I5.7 to rotate along the X-axis direction, so as to rotate the line laser measuring head I5.8 to enable the measuring range to cover all or a larger part of the tooth surface;
similarly, the second motor for tilting 5.14 is controlled to rotate to drive the second measuring head frame 5.15 to rotate along the X-axis direction, so that the second measuring head 5.16 of the line laser is rotated to enable the measuring range to cover all or a larger part of the tooth surface.
Seventh step: three-dimensional coordinates of the target gear are measured.
The turntable 6.1 is started to drive the measured piece 7 to rotate at a constant speed, and the built-in circular grating of the turntable sends out signals when rotating for a certain angle to trigger the first line laser measuring head 5.8 and the second line laser measuring head 5.16 to sample, and the turntable stops after rotating for at least one complete circle, so that coordinate measurement information of the measured piece 7 is obtained.
Eighth step, measurement is finished: and printing and outputting the three-dimensional coordinates.
Claims (7)
1. The gantry type double-line laser measuring head coordinate measuring device is characterized by comprising six parts, namely a base unit 1, a gantry bracket unit 2, an X-axis unit 3, a Y-axis unit 4, a double-line laser measuring head unit 5 and a rotary table unit 6, wherein the rotary table unit 6 is respectively fixed above the base unit 1 and used for fixing a measured piece 7, the gantry bracket unit 2 is fixed above the base unit 1 and used for supporting the X-axis unit 3 above the gantry bracket unit 2, the Y-axis unit 4 is arranged on the X-axis unit 3, and the double-line laser measuring head unit 5 is connected with the Y-axis unit 4.
2. A gantry type dual line laser gauge head coordinate measuring apparatus as claimed in claim 1, wherein: the base unit 1 includes a base bracket 1.2 at the bottom and a marble platform 1.1 mounted thereon.
3. A gantry type dual line laser gauge head coordinate measuring apparatus as claimed in claim 1, wherein: the gantry support unit 2 comprises a gantry support 2.1 and a gantry support 2.2, wherein the gantry support 2.1 and the gantry support 2.2 are symmetrically arranged on the marble platform 1.1, and four supports of the gantry support 2.1 and the gantry support 2.2 and four supports of the base support 1.2 are distributed on the same vertical shaft.
4. A gantry type dual line laser gauge head coordinate measuring apparatus as claimed in claim 1, wherein: the X-axis unit 3 comprises four groups of screw rod sliding block mechanisms which are symmetrically distributed on a gantry support 2.1 and a gantry support 2.2, wherein a left X-axis unit 3.1 and a right X-axis unit 3.8 moving part are formed between every two of the four groups of screw rod sliding block mechanisms, a first screw rod sliding block 3.2 and a third screw rod sliding block 3.9 are installed on the same axis of the upper top end surface of the gantry support 2.1 in a top-to-top opposite mode, one end of the first screw rod sliding block 3.2 is provided with a first screw rod motor 3.3, a first grating 3.6 is installed on the gantry support 2.1 and connected with the first screw rod sliding block 3.2, one end of the second screw rod sliding block 3.4 is provided with a second screw rod motor 3.5, and a second grating 3.7 is installed on the gantry support 2.1 and connected with the second screw rod sliding block 3.4;
the three 3.9 and four 3.11 lead screw sliders are installed on the same axis of the upper top end face of the gantry support 2.2 in opposite directions, one end of the three 3.9 lead screw sliders is provided with the three 3.10 lead screw motor, the three 3.13 grating is installed on the gantry support 2.2 and connected with the three 3.9 lead screw sliders, one end of the four 3.11 lead screw sliders is provided with the four 3.12 lead screw motor, and the four 3.14 grating is installed on the gantry support 2.2 and connected with the three 3.9 lead screw sliders.
5. A gantry type dual line laser gauge head coordinate measuring apparatus as claimed in claim 1, wherein: the Y-axis unit 4 comprises two groups of screw rod sliding block mechanisms which are arranged on a first beam 4.1 and a second beam 4.6, wherein a screw rod sliding block five 4.2 is arranged on the first beam 4.1, a screw rod sliding block six 4.7 is arranged on the second beam 4.6, one end of the first beam 4.1 is arranged on the first screw rod sliding block 3.2, the other end of the first beam is arranged on the second screw rod sliding block 3.4, one end of the screw rod sliding block five 4.2 is provided with a screw rod motor five 4.3, a grating five 4.5 is arranged on the first beam 4.1 and is connected with the second screw rod sliding block 3.4, and a linear guide rail one 4.4 is arranged below the first beam 4.1;
one end of the beam II 4.6 is arranged on the screw rod sliding block III 3.9, the other end of the beam II is arranged on the screw rod sliding block IV 3.11, one end of the screw rod sliding block IV 4.7 is provided with a screw rod motor IV 4.8, the grating IV 4.1 is arranged on the beam II 4.6 and connected with the screw rod sliding block IV 4.7, and a linear guide rail II 4.9 is arranged below the beam II 4.6.
6. A gantry type dual line laser gauge head coordinate measuring apparatus as claimed in claim 1, wherein: the double-line laser measuring head unit 5 comprises a first vertical frame 5.1 and a second vertical frame 5.9, wherein the first vertical frame 5.1 is arranged on a screw rod sliding block five 4.2 and a linear guide rail one 4.4, one end of the screw rod sliding block seven 5.2 is provided with a screw rod motor seven 5.3, a grating seven 5.4 is arranged on the first vertical frame 5.1 and connected with the screw rod sliding block seven 5.2, a motor frame connecting piece one 5.5 is arranged on the screw rod sliding block seven 5.2, a tilting motor one 5.6 is arranged on the motor frame connecting piece one 5.5, an output shaft of the tilting motor one 5.6 is rigidly connected with a rotating measuring head one 5.7, and the measuring head frame one 5.7 is used for fixing a line laser measuring head one 5.8;
the second vertical frame 5.9 is arranged on the sixth screw rod sliding block 4.7 and the second linear guide rail 4.9, one end of the eighth screw rod sliding block 5.10 is provided with the eighth screw rod motor 5.11, the eighth grating 5.12 is arranged on the second vertical frame 5.9 and connected with the eighth screw rod sliding block 5.10, the eighth screw rod sliding block 5.10 is provided with the second motor frame connecting piece 5.13, the second motor frame connecting piece 5.13 is provided with the second motor for tilting 5.14, the output shaft of the second motor for tilting 5.14 is rigidly connected with the second rotary measuring head frame 5.15, and the second measuring head frame 5.15 is used for fixing the second linear laser measuring head 5.16.
7. A gantry type dual line laser gauge head coordinate measuring apparatus as claimed in claim 1, wherein: the turntable unit 6 includes a turntable 6.1 and a three-jaw chuck 6.2, the turntable 6.1 is provided on the marble table 1.1, and the three-jaw chuck 6.2 is provided on the turntable 6.1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310483110.7A CN116518874A (en) | 2023-04-28 | 2023-04-28 | Gantry type double-line laser measuring head coordinate measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310483110.7A CN116518874A (en) | 2023-04-28 | 2023-04-28 | Gantry type double-line laser measuring head coordinate measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116697929A (en) * | 2023-08-04 | 2023-09-05 | 华北理工大学 | Automatic scanning device of line laser measuring instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116697929A (en) * | 2023-08-04 | 2023-09-05 | 华北理工大学 | Automatic scanning device of line laser measuring instrument |
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