CN219551439U

CN219551439U - Ultra-large workpiece measuring device

Info

Publication number: CN219551439U
Application number: CN202321234347.3U
Authority: CN
Inventors: 王军军; 王炳森
Original assignee: Kaihua Qianjiangyuan High End Equipment Research Institute
Current assignee: Kaihua Qianjiangyuan High End Equipment Research Institute
Priority date: 2023-05-22
Filing date: 2023-05-22
Publication date: 2023-08-18
Anticipated expiration: 2033-05-22

Abstract

The utility model discloses an ultra-large workpiece measuring device which comprises a base assembly, a rotary table, a measuring head, two supporting arms, an optical path transmission pipe, a contour measuring mechanism and a diameter measuring mechanism, wherein the rotary table is arranged on the base assembly; the rotary table is installed on the base assembly, two support arms are installed on the upper surface of the rotary table in parallel side by side, the measuring head and the profile measuring mechanism are arranged between the two support arms, the tail end of the profile measuring mechanism is arranged between the two support arms, the light path transmission pipe is installed at the top of one support arm, and the light path transmission pipe is connected with the profile measuring mechanism. The utility model can measure the length, diameter, coaxiality, surface roughness and other data of the workpiece by using the same instrument, thereby ensuring the measurement precision and the measurement diversity.

Description

Ultra-large workpiece measuring device

Technical Field

The utility model relates to a workpiece measuring device, in particular to an ultra-large workpiece measuring device, and belongs to the field of measurement.

Background

At present, the high-speed development of industrialization has higher and higher precision requirements on workpieces, and the precision requirements during processing parts are naturally important, but the measurement on the workpieces after the processing is completed is also indispensable. Only in high precision machining during machining and accurate measurement after machining, whether the workpiece meets the requirements or not can be ensured.

For small-sized workpieces, the method has a plurality of convenient and quick measuring means and methods, and the traditional measuring method or the novel measuring means provide great convenience for the production of the small-sized workpieces in the real industry.

However, the measuring device for large-sized workpieces is not perfect, and in recent years, the measuring device can measure the workpieces comprehensively by means of three-dimensional scanners and other instruments, but the high price does not have a way to make the measuring device widely applied in industry. Meanwhile, the measuring function of each item of data is very dispersed, too many dispersed tools are needed to be carried, the length, diameter, coaxiality, surface roughness and other data of a workpiece cannot be measured by the same instrument, and the respective operations are very inconvenient.

Disclosure of Invention

The utility model aims to solve the problems of ensuring the measurement precision and the measurement diversity by using the same instrument to measure the length, diameter, coaxiality, surface roughness and other data of a workpiece on the basis of control cost, and further provides an ultra-large workpiece measuring device.

The technical scheme adopted by the utility model for solving the problems is as follows:

an ultra-large workpiece measuring device comprises a base assembly, a rotary table, a measuring head, two supporting arms, an optical path transmission pipe, a contour measuring mechanism and a diameter measuring mechanism; the rotary table is installed on the base assembly, two support arms are installed on the upper surface of the rotary table in parallel side by side, the measuring head and the profile measuring mechanism are arranged between the two support arms, the tail end of the profile measuring mechanism is arranged between the two support arms, the light path transmission pipe is installed at the top of one support arm, and the light path transmission pipe is connected with the profile measuring mechanism.

Further, the profile measuring mechanism comprises a laser emitter, a condensing lens is arranged on a channel along which the laser emitter emits laser, a photoelectric sensor is arranged on the end side of the laser emitter, and an imaging lens is arranged on a channel along which the photoelectric sensor receives the laser.

Further, the diameter measuring mechanism comprises a dial indicator and dial indicator support frames, the number of the dial indicators is three, the dial indicator support frames are provided with three sub-supports, and the three dial indicators are respectively arranged on the sub-supports of the dial indicator support frames.

Further, the measuring head is cuboid, and a rotating shaft is connected between the measuring head and the two supporting arms respectively.

Further, a Y-shaped bracket is arranged on the measuring head, and the Y-shaped bracket is arranged on the side wall between the profile measuring mechanism and the side wall where the diameter measuring mechanism is located on the measuring head.

Further, a baffle is arranged on the upper surface of the rotary table.

Further, the upper surface of revolving stage is equipped with the display stand.

Further, the lower surface of the rotary table is provided with a lifting mechanism.

Further, the lifting mechanism is an electric lifting rod, the number of the electric lifting rods is four, and the four electric lifting rods are uniformly distributed on the lower surface of the rotary table along the same circumference taking the center of the rotary table as the center of a circle.

Further, the base assembly comprises a base and a traveling mechanism, wherein the traveling mechanism is arranged on the lower surface of the base, and the upper surface of the base is fixedly connected with the bottom of the electric lifting rod.

The beneficial effects of the utility model are as follows:

through the arrangement of the contour measuring mechanism and the diameter measuring mechanism, the complex use process of the respective operation and measurement of the data such as the length, the diameter, the coaxiality, the surface roughness and the like of the workpiece is greatly simplified, and the measurement is convenient. Through the setting of baffle and Y type support, be used for as the benchmark when measuring, make the measurement more accurate. The laser emission is not shielded by the measured object through the arrangement of the light path transmission tube, so that the laser can be emitted at a high point. Through the setting of revolving stage, lifter and measuring head, can measure different height and angle, make the measurement can satisfy the demand in each position.

Drawings

Fig. 1 is a schematic structural view of one embodiment of the ultra-large workpiece measuring robot of the present utility model.

Fig. 2 is a left side view of the embodiment of fig. 1.

Fig. 3 is a top view of the embodiment of fig. 1.

In the figure: 1. a walking mechanism; 2. a base; 3. a lifting mechanism; 4. a rotary table; 5. a measuring head; 6. a baffle; 7. a support arm; 8. an optical path transmission tube; 9. a Y-shaped bracket; 10. a contour measuring mechanism; 11. a display stand; 12. diameter measuring means.

Detailed Description

The first embodiment is as follows: 1-3, the ultra-large workpiece measuring device according to the present embodiment includes a base assembly, a rotary table 4, a measuring head 5, two supporting arms 7, an optical path transmission tube 8, a contour measuring mechanism 10 and a diameter measuring mechanism 12; the rotary table 4 is installed on the base assembly, two supporting arms 7 are installed on the upper surface of the rotary table 4 side by side in parallel, the measuring head 5 and the profile measuring mechanism 10 are arranged between the two supporting arms 7, the tail end of the profile measuring mechanism 10 is arranged between the two supporting arms 7, the optical path transmission pipe 8 is installed at the top of one supporting arm 7, and the optical path transmission pipe 8 is connected with the profile measuring mechanism 10. Preferably, the rotary table 4 is an electric rotary table, the model is ERT, and under the drive of motor drive and worm gear, the rotary table 4 is enabled to rotate by 360 degrees, so that the measurement can meet the requirements of all directions. The two supporting arms 7 can be identical or different in shape, the measuring head 5 is rectangular, and a rotating shaft is respectively connected between the measuring head 5 and the two supporting arms (7) and is connected between the two supporting arms 7 in a rotating way. The two support arms 7 are used for supporting the measuring head 5, so that the measuring head 5 can rotate smoothly and is also a storage place for the lines used for measurement. The measuring head 5 can be properly rotated according to the requirement during measurement, so that the measurement is convenient. Be close to be equipped with light path transmission pipe 8 on the support arm 7 of laser emitter end side, be convenient for satisfy the demand of measurement height, make laser emission not sheltered from by the measured object, let laser emission at the high point. The measuring head 5 is also provided with a Y-shaped bracket 9, and the Y-shaped bracket 9 is arranged on the side wall between the profile measuring mechanism 10 and the side wall where the diameter measuring mechanism 12 is positioned and is used as a reference, so that the measuring device is convenient to be parallel to an object to be measured during measurement.

The profile measuring mechanism 10 comprises a laser emitter, a condensing lens is arranged along a channel of the laser emitter for emitting laser, a photoelectric sensor is arranged at the end side of the laser emitter, and an imaging lens is arranged along a channel of the photoelectric sensor for receiving the laser. The laser beam emitted by the laser transmitter irradiates on the measured workpiece through the optical path transmission pipe 8, then the laser beam is reflected on the surface of the workpiece, and the reflected light beam is received by the photoelectric sensor. When measuring surface roughness, the light emitted by the laser emitter irradiates the surface of the measured object after passing through the condenser lens, and diffuse reflection occurs no matter to which point the light is projected because the surface of the object cannot be absolutely smooth. These diffuse reflecting fibers are imaged by the imaging lens and transmitted to the receiving face of the photosensor to convert the optical signals into electrical signals. The diameter of the laser beam after passing through the condenser lens is generally 0.25mm to 0.5mm, and the high precision is achieved. When the length is measured, the laser ranging technology by the phase method is utilized, the adopted laser frequency is in a radio wave band, the amplitude of the laser is modulated firstly, then sinusoidal modulated light is emitted, at the moment, a baffle plate for assisting in reflecting the laser is needed, and after the laser is reflected by the baffle plate, the phase difference generated during the received laser and the emission is measured. According to the frequency and wavelength of the emitted light, the laser round trip time is calculated, and then the calculated distance is calculated according to a related formula.

The diameter measuring mechanism 12 comprises a dial indicator and three dial indicator supports, wherein the dial indicator supports are provided with three sub-supports, and the three dial indicators are respectively arranged on the sub-supports of the dial indicator supports. The measuring device is used for measuring the diameter and coaxiality of the oversized workpiece. When the device is used, the principle that a circle is determined by three points is utilized, three dial indicators are used for touching the surface of the circle to obtain three numerical values, and then a coordinate system is established according to the numerical values, so that the diameter of a measured workpiece is conveniently obtained. When coaxiality needs to be measured, the coaxiality error can be obtained by subtracting the minimum value from the maximum value of the readings of the dial indicator obtained by recording the readings of the dial indicator in the middle of the diameter measuring mechanism 12.

The upper surface of revolving stage 4 is equipped with baffle 6, is convenient for when length measurement for confirm laser measurement's benchmark, makes the measurement more accurate. The upper surface of revolving stage 4 still is equipped with display stand 11, be equipped with the display screen on the display stand 11 for show the result display after the robot measurement, still be equipped with the interface on the display stand, be used for deriving the data that will obtain. The lower surface of the rotary table 4 is fixedly connected with a lifting mechanism 3, preferably, the lifting mechanism 3 is an electric lifting rod, the model is YNT-01, the number of the electric lifting rods is four, and the four electric lifting rods are uniformly distributed on the lower surface of the rotary table 4 along the same circumference taking the center of the rotary table 4 as the center of a circle. The vertical ascending and descending of the measuring device are convenient to realize, and the measuring device can meet the requirements of various heights.

The base assembly comprises a base 2 and a traveling mechanism 1, wherein the traveling mechanism 1 is arranged on the lower surface of the base 2, and the upper surface of the base 2 is fixedly connected with the bottom of the electric lifting rod. Preferably, the travelling mechanism 1 is an omnibearing wheel type mechanism travelling wheel, and comprises three degrees of freedom of movement, namely rotation, transverse direction and longitudinal direction, so as to facilitate the control of travelling. The control is simple, the energy utilization rate is high, and the high-speed stable movement can be performed. The base 2 is also a storage place of the energy source of the ultra-large workpiece measuring device, a power source is arranged in the storage place, and the storage place is also a place for placing the steering motor of the omnibearing wheel type mechanism for the walking of the ultra-large workpiece measuring device.

For convenient measurement, propose an auxiliary robot for assist measuring robot realizes length measurement, including auxiliary base, auxiliary base's upper surface is equipped with auxiliary baffle and counter weight, auxiliary baffle is used for reflecting by laser emitter sends laser, and the hollow slab of preferred adoption 50mm 250mm 1000mm, the smooth even copper that plates in surface makes the measurement more accurate. The counterweight is used for balancing the gravity and moment of the baffle, the weight of the counterweight is larger than that of the auxiliary baffle, and the traveling wheels are arranged on the lower surface of the auxiliary base, so that the traveling is convenient to control.

Working principle:

when the length is measured, the ultra-large workpiece measuring robot uses a baffle plate to contact the side surface of the measured object, and then uses an auxiliary robot to contact the other side surface of the measured object; the robot emits a beam of laser; after laser is reflected by the auxiliary robot, the ultra-large workpiece measuring robot receives reflected laser signals; the distance between the laser emission port and the edge of the baffle plate is subtracted from the obtained length data, and the length data is the length of the measured shaft.

When the diameter is measured, the Y-shaped support is firstly used for contacting the measured object, so that the Y-shaped support is abutted against the measured object and kept motionless, and then the rotary table is regulated, so that the Y-shaped support is perpendicular to the travelling direction of the travelling wheel, and the travelling direction is parallel to the measured object. And then the diameter measuring device is opposite to the surface of the object through adjusting the measuring head and the rotary table. And then slowly move forward, and stop measuring when all three dial indicators have readings for display.

When coaxiality is measured, the Y-shaped support is firstly used for contacting the measured object, so that the Y-shaped support is abutted against the measured object and kept motionless, and then the rotary table is regulated, so that the Y-shaped support is perpendicular to the travelling direction of the travelling wheel, and the travelling direction is parallel to the measured object. And then the diameter measuring device is opposite to the surface of the object through adjusting the measuring head and the rotary table. And then the robot is driven in a straight line along the axis direction, and the coaxiality error is obtained by subtracting the maximum value and the minimum value of the obtained readings of the dial indicator B by recording the readings of the dial indicator in the middle of the diameter measuring device.

When the surface roughness is measured, the Y-shaped support is firstly used for contacting the measured object, so that the Y-shaped support is abutted against the measured object, the measured object is kept motionless, and then the rotary table is regulated, so that the profile measuring device is perpendicular to the travelling direction of the travelling wheel, and the travelling direction is parallel to the measured object. And then the contour measuring device is opposite to the measured object through the rotation of the measuring head. Then a surface contour image can be obtained to obtain the surface roughness of the measured object.

The length is measured by utilizing the laser ranging principle, the diameter and the coaxiality are measured by using the dial indicator, and the measuring devices such as the surface roughness are measured by using the laser profile measuring technology and are combined together, and on the basis that energy is provided by a lithium battery, a motor forward and reverse rotation mechanism, an electric lifting rod device, an electric rotating table device, an omnibearing wheel type moving device and other moving mechanisms are combined, and the auxiliary robot is matched, so that omnibearing, multifunctional and remotely controllable measurement is realized.

The present utility model is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other embodiments, such as those described above, of making various modifications and equivalents will fall within the spirit and scope of the present utility model.

Claims

1. The ultra-large workpiece measuring device is characterized by comprising a base assembly, a rotary table (4), a measuring head (5), two supporting arms (7), an optical path transmission pipe (8), a contour measuring mechanism (10) and a diameter measuring mechanism (12); the utility model discloses a light path transmission mechanism, including base subassembly, revolving stage (4) is installed on the base subassembly, two support arm (7) parallel mount side by side is in the upper surface of revolving stage (4), measuring head (5) with profile measurement mechanism (10) set up two between support arm (7), the end setting of profile measurement mechanism (10) is two between support arm (7), light path transmission pipe (8) are installed in the top of support arm (7), light path transmission pipe (8) with profile measurement mechanism (10) are connected.

2. The ultra-large workpiece measuring device according to claim 1, wherein the profile measuring mechanism (10) comprises a laser emitter, a condensing lens is arranged along a laser emitting channel of the laser emitter, a photoelectric sensor is arranged at an end side of the laser emitter, and an imaging lens is arranged along a laser receiving channel of the photoelectric sensor.

3. The ultra-large workpiece measuring device according to claim 1, wherein the diameter measuring mechanism (12) comprises a dial indicator and dial indicator supports, the number of the dial indicators is three, the dial indicator supports are provided with three sub-supports, and the three dial indicators are respectively arranged on the sub-supports of the dial indicator supports.

4. The ultra-large workpiece measuring device according to claim 1, wherein the measuring head (5) is rectangular, and a rotary shaft is respectively connected between the measuring head (5) and the two supporting arms (7).

5. The ultra-large workpiece measuring device according to claim 4, wherein the measuring head (5) is provided with a Y-shaped bracket (9), and the Y-shaped bracket (9) is arranged on a side wall between the profile measuring mechanism (10) and the diameter measuring mechanism (12) on the measuring head (5).

6. A very large workpiece measuring device according to claim 1, characterized in that the upper surface of the rotary table (4) is provided with a baffle (6).

7. A very large workpiece measuring device according to claim 1, characterized in that the upper surface of the rotary table (4) is provided with a display table (11).

8. The ultra-large workpiece measuring device according to claim 1, characterized in that the lower surface of the rotary table (4) is provided with a lifting mechanism (3).

9. The ultra-large workpiece measuring device according to claim 8, wherein the lifting mechanism (3) is four electric lifting rods, and the four electric lifting rods are uniformly distributed on the lower surface of the rotary table (4) along the same circumference taking the center of the rotary table (4) as the center of a circle.

10. The ultra-large workpiece measuring device according to claim 9, wherein the base assembly comprises a base (2) and a traveling mechanism (1), the traveling mechanism (1) is arranged on the lower surface of the base (2), and the upper surface of the base (2) is fixedly connected with the bottom of the electric lifting rod.