CN209639686U - A kind of non-contact laser detection revolving body cross section profile pattern error device - Google Patents

Abstract

The utility model provides a non-contact laser detection device for the cross-sectional contour shape error of a rotary body, which is mainly composed of a vertical lifting platform, a horizontal sliding platform, a sliding platform mounting plate, a precision turntable, a laser displacement sensor, an encoder and various connecting parts . By adjusting the position of the sliding table mounting plate, the laser displacement sensor is in the best range, adjust the angle of the laser displacement sensor according to the optical reflection of the surface of the measured workpiece, and adjust the measured section of the measured workpiece through the computer control vertical lifting platform The position of the laser displacement sensor is adjusted through the computer to control the precision sliding table. The data collected by the sensor is transmitted to the computer through the acquisition card, and the data is processed to obtain the profile roughness, waviness and shape error of the measured section of the workpiece.

Description

A non-contact laser detection device for the cross-sectional profile shape error of a rotating body

technical field

The utility model belongs to the field of non-contact laser detection, in particular to a device for non-contact laser detection of cross-sectional contour shape error of a rotary body.

Background technique

A body of revolution refers to a geometric figure with an axis of rotational symmetry, and the shape of the cross-section of the body of revolution is a circle. Parts of revolution are integral parts of most industrial products, especially in manufacturing, where about 70% of engineering components have an axis of rotational symmetry. Since the manufacturing process of the parts cannot be ideal, the cross-section of the processed rotary parts cannot be an ideal circle. ISO 1101 defines circularity as two concentric circles containing all points on a given section whose diameters differ the least. The roundness error of the workpiece is an important indicator reflecting the quality of the rotating parts. Unqualified roundness error will cause abnormal vibration, wear, impact and other problems of the machine.

There are two types of measurement techniques for the profile error measurement of the section profile of a rotating body: contact measurement and non-contact measurement. In the contact measurement method, during the measurement process, the probe is always in close contact with the surface of the measured part, and there are problems of probe wear and part surface scratches, and due to the existence of the spherical contact radius of the probe, the actual contact point and the theoretical contact point There are differences, there are theoretical errors. Compared with the contact measurement method, the non-contact measurement method solves the problems of low lateral resolution and cumbersome movement path of the probe in contact measurement, and is easy to operate and greatly improves the detection efficiency. Therefore, it is of great significance to carry out the research on the non-contact laser detection device for the profile error of the section profile of the rotary body.

The non-contact laser inspection technology is affected by the surface quality of the parts to be tested. For parts with strong specular reflection, it is necessary to use specular reflection light to measure, while for parts with diffuse reflection, it is necessary to use diffuse reflection light to measure.

To sum up, the development of the detection technology for the cross-sectional contour error of the rotating body urgently needs a non-contact laser detection device for the cross-sectional contour error of the rotating body, which can accurately and quickly test the cross-sectional contour error of the rotating body. The design and development of a non-contact laser detection device for the profile error of the cross-section of the rotating body is of great significance and practical application value.

Utility model content

The purpose of the utility model is to provide a non-contact laser detection device for the cross-sectional contour shape error of the rotating body, which can quickly and accurately test the cross-sectional contour shape error of the rotating body.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A non-contact laser detection device for cross-sectional profile shape error of a rotating body, which is composed of a mechanical device and electrical equipment. The mechanical devices include the bottom plate of the test bench, the sliding table mounting plate, the encoder fixing plate, the laser displacement sensor mounting plate, the three-jaw chuck base, the three-jaw chuck connecting rod, the three-jaw chuck, the controller mounting plate, etc.; electrical equipment Including vertical lift table, horizontal slide table, precision turntable, laser displacement sensor, encoder, vertical lift table controller, horizontal slide table controller, precision turntable controller, acquisition card, computer and DC power supply, etc.

There are three sets of threaded holes on the top of the bottom plate of the test bench: four threaded holes are used to install the precision lifting platform, four threaded holes are used to install the slide table mounting plate, and two threaded holes are used to install the controller mounting plate.

The sliding table mounting plate has four long holes for connecting with the bottom plate of the test bench and adjusting the installation position; there are four threaded holes on the sliding table mounting plate for installing the horizontal sliding table.

The encoder mounting plate is obtained by bending and processing a stainless steel plate. There are four through holes at the bottom for mounting on the top of the vertical lifting platform, and two through holes at the top for connecting with the threaded holes on the encoder with bolts.

The laser displacement sensor mounting plate is obtained by welding a base plate and a vertical plate, and there are four through holes at the bottom for installation on the horizontal slide table; there is a long hole on the vertical plate for installing the laser displacement sensor and Adjust its installation position and angle.

The bottom of the three-jaw chuck installation base has four through holes, which are used to connect with the threaded holes on the top of the precision turntable with bolts; the upper part of the three-jaw chuck installation base has three sections of shafts with different shaft diameters. There is an undercut between the second shafts, the second shaft is used to install the encoder, the inner ring of the encoder is positioned with a shaft shoulder, the third shaft is used to install the connecting rod of the three-jaw chuck, and the third shaft is milled A small flat surface is used for locking the set screw attached to the connecting rod of the three-jaw chuck.

The controller mounting plate is obtained by bending and processing a stainless steel plate. There are two through holes at the bottom for installation on the bottom plate of the test bench; there are two through holes in the middle of the vertical plate for installing the precision turntable controller. There are two through holes for mounting the vertical lift controller and the horizontal slide controller.

The utility model has the advantages of non-contact measurement, no damage to the workpiece surface, high detection efficiency, simple operation and accurate measurement results. This set of equipment can accurately test the shape error of the profile of the section of the rotary body, including: profile, shape error, waviness, and roughness of the section of the rotary body. The whole set of equipment is designed based on the principle of laser detection, which is convenient for processing, assembly and disassembly, automatic detection is realized through the program, and the operation of the whole testing process is simple and flexible. In addition, this device can also be used to measure the contour shape error measurement of non-rotating parts (such as hexagonal shafts, etc.) whose surface is mainly diffuse reflection.

Description of drawings

Fig. 1 is the schematic diagram of the front side of the overall structure of the utility model

Fig. 2 is the schematic diagram of the rear side of the overall structure of the utility model

Figure 3 is an exploded view of the assembly of the utility model

Fig. 4 is the specific working process flowchart of the utility model

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Fig. 1, Fig. 2 and Fig. 3, the utility model is a device for non-contact laser detection of the cross-sectional contour shape error of the rotary body, and the parts are as follows: the bottom plate of the test bench (1), the bolt (2), the vertical lifting platform (3), encoder fixing plate (4), bolts (5), precision turntable (6), controller mounting plate (7), bolts (8), precision turntable controller (9), vertical lift controller ( 10), bolt (11), horizontal slide table controller (12), bolt (13), three-jaw chuck (14), measured workpiece (15), three-jaw chuck connecting rod (16), encoder ( 17), nut (18), laser displacement sensor mounting plate (19), laser displacement sensor (20), bolt (21), bolt (22), bolt (23), three-jaw chuck base (24), bolt ( 25), bolt (26), horizontal slide table (27), bolt (28), slide table mounting plate (29); other parts such as computer, acquisition card, wire are not represented in the figure.

As shown in Figure 3, the vertical lifting platform (3) is fixedly connected to the bottom plate (1) of the test bench through four bolts (2); three bolts (5) pass through the precision turntable (6) and the encoder fixing plate (4) Screw the three through holes into the three threaded holes on the top of the vertical lifting platform (3) to realize the fixed connection of the encoder fixing plate (4), the precision turntable (6) and the compact lifting platform (3); the four bolts ( 23) Pass through the four through holes on the three-jaw chuck base (24) and screw into the four threaded holes on the top of the precision turntable (6) to realize the fastening between the three-jaw chuck base (24) and the precision turntable (6). Connect; the encoder (17) falls on the three-jaw chuck base (24), the inner ring of the encoder (17) is on the shoulder of the three-jaw chuck base (24), and the inner hole of the encoder (17) is connected to the three-jaw chuck base (24). The shaft section of the jaw chuck base (24) is a transition fit, and the lock nut provided with the encoder (17) is used to lock the inner ring of the encoder (17) to the shaft section of the three-jaw chuck base (24). The two bolts (22) pass through the two through holes on the top of the encoder fixing plate (4) and screw into the two threaded holes on the top of the encoder (17) to realize the outer ring of the encoder (17) and the encoding The three-jaw chuck connecting rod (16) falls on the shaft section with the smallest shaft diameter of the three-jaw chuck base (24), and pushes against the inner ring of the encoder (17). The cooperation between the inner hole of the chuck connecting rod (16) and the shaft section with the smallest shaft diameter of the three-jaw chuck base (24) is a transition fit. The self-contained locking screw makes it tighten on the plane to realize the solid connection between the three-jaw chuck connecting rod (16) and the three-jaw chuck base (24); the three-jaw chuck (14) connects to the The threaded rod on the top of the three-jaw chuck connecting rod (16) is connected; the measured workpiece (15) is clamped on the three-jaw chuck (14) by adjusting the clamping range of the three-jaw chuck (14); the four bolts ( 28) Screw through the four long holes of the slide table mounting plate (29) into the four threaded holes of the test bench bottom plate (1) to realize the fixed connection between the slide table mounting plate (29) and the test bench bottom plate (1) ; Four bolts (26) pass through the four countersunk through holes at the bottom of the horizontal slide (27) and screw into the four threaded holes of the slide mounting plate (29) to realize the installation of the horizontal slide (27) and the slide The fixed connection of the plate (29); four bolts (25) pass through the four through holes at the bottom of the laser displacement sensor mounting plate (19) and screw into the four threaded holes at the top of the horizontal slide table (27) to realize the laser displacement sensor The fixed connection of the mounting plate (19) and the horizontal slide table (27); the bolt (21) passes through the countersunk through hole installed by the laser displacement sensor (20) and the elongated hole of the laser displacement sensor mounting plate (19). (18) is locked to realize the connection between the laser displacement sensor (20) and the laser displacement sensor mounting plate (19). After the rotation and translation degrees of freedom of the laser displacement sensor (20) are locked by the bolt (21) Provided friction to limit; two bolts (8) are screwed through the two through holes at the bottom of the controller mounting plate (7) In the two threaded holes of the bottom plate of the test bench (1), the fixed connection between the controller mounting plate (7) and the bottom plate of the test bench (1) is realized; two bolts (13) pass through the two holes in the middle of the controller mounting plate (7). Two through holes are screwed into the two threaded holes on the back of the precision turntable controller (9) to realize the fixed connection between the precision turntable controller (9) and the controller mounting plate (7); the four bolts (11) pass through the vertical Four U-shaped holes of the lifting platform controller (10) and the horizontal sliding platform controller (12) are screwed into four threaded holes on both sides of the controller mounting plate (7) to realize the vertical lifting platform controller (10) and the controller The fixed connection of the mounting plate (7) and the fixed connection of the horizontal slide table controller (12) and the controller mounting plate (7). So far, the installation of a non-contact laser detection device for the cross-sectional contour shape error of the rotating body is completed.

Below in conjunction with accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 4 describe the specific working process of testing device in the present embodiment:

By adjusting the clamping range of the three-jaw chuck (14), the workpiece (15) to be tested is clamped on the three-jaw chuck (14); the bolt (28) is loosened to adjust the position of the sliding table mounting plate (29), Keep the laser displacement sensor (20) within the optimum range, then tighten the bolt (28); loosen the bolt (21) and the nut (18), and adjust the laser displacement sensor according to the optical reflection of the measured workpiece surface (15) (20) angle, after adjusting the angle, lock the bolt (21) and the nut (18); adjust the position of the measured section of the workpiece (15) through the computer control vertical lifting platform (3); control the horizontal sliding platform through the computer (27) Adjust the horizontal position of the laser displacement sensor (20), so that the light emitting the laser light is as close as possible to the axis of the measured workpiece (15). The data collected by the encoder (17) and the laser displacement sensor (20) are transmitted to the computer through the acquisition card, and the collected data are processed by methods such as Fourier transform to obtain signals of different frequencies. According to the shape error, waviness, The frequency distribution characteristics of the roughness signal are filtered to obtain the signal of each shape error, and finally the distribution of the measured cross-sectional profile of the measured workpiece is obtained by using the inverse Fourier transform. curve.

Claims (6)

1. a kind of non-contact laser detects revolving body cross section profile pattern error device, it is characterised in that: laser displacement sensor (20) it is installed on laser displacement sensor mounting plate (19), laser displacement sensor mounting plate (19) is installed on horizontal sliding table (27) it on, is installed on horizontal sliding table (27) on slide unit mounting plate (29), slide unit mounting plate (29) is installed on experimental bench bottom plate (1) On；Measured workpiece (15) is installed on scroll chuck (14), and scroll chuck (14) is installed on by scroll chuck connecting rod (16) On scroll chuck pedestal (24), scroll chuck pedestal (24) is installed on precise rotating platform (6), and precise rotating platform (6) is mounted on vertically On lifting platform (3), vertical lift platform (3) is installed on experimental bench bottom plate (1)；Encoder (17) is installed on scroll chuck pedestal (24) fixation of encoder (17) outer ring is realized on axis with encoder fixed plate (4), encoder fixed plate (4) bottom is installed on Interplanar between precise rotating platform (6) and vertical lift platform (3)；Precise rotating platform controller (9), vertical lift platform controller (10), horizontal sliding table controller (12) is installed on controller mounting plate (7), and controller mounting plate (7) is installed on experimental bench bottom On plate (1)；After the position for adjusting laser displacement sensor (20) and measured workpiece (15), driving precise rotating platform (6) rotation, Measured workpiece (15) data can be measured.

2. a kind of non-contact laser according to claim 1 detects revolving body cross section profile pattern error device, feature Be: vertical lift platform (3) is bolted with experimental bench bottom plate (1), and encoder fixed plate (4) lower end is clipped in precise rotating platform (6) Between vertical lift platform (3), precise rotating platform (6) is threadedly coupled with vertical lift platform (3), scroll chuck pedestal (24) and precision Turntable (6) is threadedly coupled, and encoder (17) is fallen on scroll chuck pedestal (24), and encoder (17) inner ring withstands on scroll chuck bottom On the shaft shoulder of seat (24), encoder (17) inner hole and matching for (24) second shaft part of scroll chuck pedestal are combined into transition fit, with volume The included locking nut locking of code device (17), encoder (17) outer ring are connect with encoder fixed plate (4) threaded upper ends, three-jaw card Brace rod (16) is fallen on the smallest shaft part of scroll chuck pedestal (24) diameter of axle, is withstood on encoder (17) inner ring, three-jaw card Brace rod (16) inner hole and matching for the smallest shaft part of scroll chuck pedestal (24) diameter of axle are combined into transition fit, which mills out One plane holds out against it by the included lock-screw of rotation scroll chuck connecting rod (16) and realizes three-jaw on this plane Connected, the threaded hole and scroll chuck that scroll chuck (14) passes through bottom of chuck connecting rod (16) and scroll chuck pedestal (24) Threaded rod at the top of connecting rod (16) is threadedly coupled.

3. a kind of non-contact laser according to claim 2 detects revolving body cross section profile pattern error device, feature Be: slide unit mounting plate (29) is threadedly coupled with experimental bench bottom plate (1), and horizontal sliding table (27) and slide unit mounting plate (29) screw thread connect It connects, laser displacement sensor mounting plate (19) is threadedly coupled with horizontal sliding table (27), and laser displacement sensor and laser displacement pass Sensor mounting plate (19) is threadedly coupled, and the freedom degree of rotation and the translation of laser displacement sensor (20) is by bolt (21) nut (18) frictional force that provides limits after locking.

4. a kind of non-contact laser according to claim 1 detects revolving body cross section profile pattern error device, feature Be: controller mounting plate (7) is threadedly coupled with experimental bench bottom plate (1), precise rotating platform controller (9) and controller mounting plate (7) it is threadedly coupled, vertical lift platform controller (10) is threadedly coupled with controller mounting plate (7), horizontal sliding table controller (12) It is threadedly coupled with controller mounting plate (7).

5. a kind of non-contact laser according to claim 2 detects revolving body cross section profile pattern error device, feature Be: there are four through-holes for scroll chuck pedestal (24) bottom, for being connected with the threaded hole at the top of precise rotating platform (6), The axis of three sections of different diameters of axle is arranged at scroll chuck pedestal (24) top, there is an escape between first segment axis and second segment axis, the For installing encoder (17), encoder (17) inner ring is positioned two sections of axis with the shaft shoulder, and third section axis is for installing scroll chuck company Extension bar (16), third section axis mill out locking of the facet for the holding screw that scroll chuck connecting rod (16) carry.

6. a kind of non-contact laser according to claim 3 detects revolving body cross section profile pattern error device, feature Be: laser displacement sensor mounting plate (19) is obtained by one piece of bottom plate and one piece of vertical plate welding processing, and there are four through-holes for bottom For being mounted on horizontal sliding table (27), there is a strip hole for installing laser displacement sensor (20) and adjustment on vertical plate Its installation site, angle.