CN113899325B - Screw rod detection device, screw rod detection method, computer storage medium and electronic device - Google Patents
Screw rod detection device, screw rod detection method, computer storage medium and electronic device Download PDFInfo
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- CN113899325B CN113899325B CN202111487567.2A CN202111487567A CN113899325B CN 113899325 B CN113899325 B CN 113899325B CN 202111487567 A CN202111487567 A CN 202111487567A CN 113899325 B CN113899325 B CN 113899325B
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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
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/042—Calibration or calibration artifacts
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Abstract
The invention discloses a screw rod detection device, which comprises: a base; the first detection assembly is arranged on the base, a detected screw rod, a detected nut sleeved on the detected screw rod and a stepping motor driving the detected screw rod to rotate are arranged on the first detection assembly, and the first detection assembly is used for detecting the rotation angle of the stepping motor; the second detection assembly is arranged on the base and used for detecting the linear displacement of the detected nut and compensating the detected nut through the linear displacement and the rotation angle; and the detection and calibration assembly is arranged on the base and is used for calibrating the compensated nut to be tested. According to the invention, double-station time-sharing detection is adopted, the first detection assembly is matched with the second detection assembly to detect the screw rod precision of a single part, and the detection calibration assembly is matched to detect the integral linear precision and the circumferential precision of the screw rod stepping motor after the whole machine is assembled, so that the analysis of the state of the screw rod is facilitated.
Description
Technical Field
The invention belongs to the technical field of screw rod detection, and particularly relates to a screw rod detection device, a screw rod detection method, a computer storage medium and electronic equipment.
Background
The existing screw rod precision detection device adopts a stepping motor as a power source to detect the precision of a screw rod, and due to the physical characteristics of the stepping motor, when the motor commutates, tooth-shaped hysteresis errors exist, so that the commutation angle and the theoretical angle have larger difference, and the accuracy of linear precision is finally influenced; secondly, when a commutation error occurs, the error generated by commutation in the integral linear motion is a composite error formed by the circumferential angle error of the screw rod stepping motor and the commutation error of the screw rod, and the two errors cannot be distinguished in an actual test; for the lead screw stepping motor, the precision requirement is higher to itself in more accurate application field, if these two kinds of errors can't be distinguished, precision is not enough when can lead to the precision analysis, influences the analysis effect, and then leads to the finished product precision of lead screw relatively poor.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, the invention provides a screw rod detection device which has the advantages of detecting the error between the rotation angle of a stepping motor and the linear displacement of a detected nut, compensating the error and then calibrating.
The lead screw detection device according to the embodiment of the invention comprises: a base; the first detection assembly is arranged on the base, a detected screw rod, a detected nut sleeved on the detected screw rod and a stepping motor driving the detected screw rod to rotate are arranged on the first detection assembly, and the first detection assembly is used for detecting the rotation angle of the stepping motor; the second detection assembly is arranged on the base and used for detecting the linear displacement of the detected nut and compensating the detected nut through the linear displacement and the rotation angle; and the detection and calibration assembly is arranged on the base and is used for calibrating the compensated nut to be tested.
The screw rod stepping motor has the beneficial effects that the structure is simple, the first detection assembly is arranged for detecting the rotation angle of the stepping motor, the second detection assembly is arranged for detecting the linear displacement of the detected nut, the error is calculated by comparing the rotation angle with the linear displacement and is compensated to the linear displacement of the detected nut, and then the detection and calibration assembly is used for calibrating.
According to one embodiment of the invention, the first detection assembly comprises: the first mounting seat is fixedly arranged on the base, and the stepping motor is fixedly arranged on the first mounting seat; the encoder is arranged on the base and connected with the stepping motor so as to detect the rotation angle of the stepping motor; and the second mounting seat is arranged on the base in a sliding manner, the tested nut is connected with the second mounting seat, and the tested nut drives the second mounting seat to reciprocate.
According to one embodiment of the invention, the second detection assembly comprises: the grating mounting seat is arranged on one side of the second mounting seat; the grating reading head is installed on the grating installation seat and moves along with the second installation seat through the grating installation seat so as to detect the linear displacement of the nut to be detected.
According to one embodiment of the invention, a detection calibration assembly comprises: the servo motor is fixedly arranged on the first mounting seat; one end of the calibration screw rod is directly connected with the servo motor, and the other end of the calibration screw rod is connected with the base through a second bearing seat; and the calibration nut is sleeved on the calibration screw rod and connected with the second mounting seat, and the calibration nut drives the second mounting seat to reciprocate.
According to one embodiment of the invention, the encoder is connected with the base in a sliding manner, one end of the tested lead screw is directly connected with the stepping motor, the other end of the tested lead screw is connected with the base through the first bearing seat, the first bearing seat is connected with the base in a sliding manner, and the sliding directions of the first bearing seat, the second mounting seat and the encoder are all parallel to the tested lead screw.
According to one embodiment of the invention, the second bearing seat is slidably connected with the base, and the sliding directions of the second bearing seat and the second mounting seat are parallel to the calibration screw rod.
According to one embodiment of the invention, two parallel positioning grooves are formed in the base, a first sliding rail and a second sliding rail are arranged in each positioning groove, the first sliding rail is positioned on one side of the first mounting seat, a first sliding block is arranged on the first sliding rail in a sliding manner, the first sliding block is connected with the encoder, the second sliding rail is positioned on the other side of the first mounting seat, a second sliding block and a third sliding block are arranged on the second sliding rail in a sliding manner, the second sliding block is connected with the first bearing seat, and the third sliding block is connected with the second mounting seat; a third slide rail is arranged in the other positioning groove, a fourth slide block and a fifth slide block are arranged on the third slide rail in a sliding mode, the fourth slide block is connected with the second bearing seat, and the fifth slide block is connected with the second mounting seat.
According to one embodiment of the present invention, the first bearing housing and the second bearing housing are identical in structure, and the first bearing housing includes: the bearing base is arranged on the second sliding block; the spring clamp is arranged on the bearing base, and one end of the spring clamp is connected with the other end of the lead screw to be tested; the bearing is arranged between the bearing base and the spring clamp; the clamp spring is located between the bearing base and the spring clamp and located on one side of the bearing.
According to one embodiment of the invention, the end parts of the first slide rail, the second slide rail and the third slide rail are respectively provided with a limiting block.
According to one embodiment of the invention, the encoder is arranged on the first sliding block through the encoder mounting seat, the encoder is directly connected with one end of the connecting shaft through the coupler, and the other end of the connecting shaft is connected with the stepping motor.
According to one embodiment of the present invention, the first mount includes: the first installation seat plate is arranged on the base; the motor mounting plate is detachably connected with the first mounting seat plate, and the stepping motor is connected with the motor mounting plate; and one side of the supporting angle seat is connected with the first mounting seat plate, and the other side of the supporting angle seat is connected with the base.
According to an embodiment of the present invention, the second mount includes: the second mounting base plate is provided with a notch; the nut mounting panel, the nut mounting panel can be dismantled with second installation bedplate and be connected, and the nut mounting panel is equipped with the location tang towards one side of second installation bedplate, and the notch is located to the location tang card.
According to an embodiment of the present invention, a detection method of the screw rod detection device is characterized by comprising the following steps: when the stepping motor starts to rotate, the second detection assembly acquires a displacement parameter of the nut to be detected every time the nut to be detected moves for a certain distance, and meanwhile, the first detection assembly acquires a corresponding angle parameter of the stepping motor; step two: setting a theoretical angle parameter, and changing the rotation direction of the stepping motor, wherein at the moment, the first detection assembly acquires an actual angle parameter when the stepping motor is reversed; step three: calculating an angle error between the actual angle parameter and the theoretical angle parameter, converting the angle error into a displacement error, compensating the displacement error to the movement process of the measured nut, repeating the first step and the second step, and collecting the compensated displacement parameter of the measured nut; step four: the method comprises the following steps that a tested screw rod and a tested nut are arranged on a detection and calibration assembly, a servo motor starts to rotate, the detection and calibration assembly acquires a displacement parameter of the tested nut every time the tested nut moves for a certain distance, and meanwhile the servo motor provides a corresponding angle parameter; step five: and comparing the displacement parameters of the measured nut in the fourth step with the displacement parameters of the measured nut compensated in the third step, if the deviation is smaller than a set value after comparison, judging that the error compensation is successful, otherwise, re-performing the first step to the fifth step.
According to one embodiment of the invention, in the third step, the first step is repeated for a plurality of times, a plurality of groups of displacement parameters and angle parameters are recorded, and whether the overall stability of the stepping motor, the tested screw rod and the tested nut is qualified or not is judged according to the plurality of groups of displacement parameters and angle parameters.
According to an embodiment of the present invention, the method further comprises the following steps: and repeating the step four for multiple times, recording a plurality of displacement parameters, and judging whether the stability between the tested screw rod and the tested nut is qualified or not according to the plurality of displacement parameters.
According to one embodiment of the present invention, a computer storage medium includes one or more computer instructions that, when executed, implement the detection method described above.
According to one embodiment of the invention, an electronic device includes a memory for storing one or more computer instructions and a processor; the processor is used for calling and executing one or more computer instructions so as to realize the detection method.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic perspective view of a lead screw detecting device according to the present invention;
FIG. 2 is a schematic view of a partial structure of a lead screw detecting device according to the present invention;
FIG. 3 is a partial schematic view of another angle in the lead screw detecting device according to the present invention;
FIG. 4 is a partial structural schematic view of a first detecting member in the lead screw detecting device according to the present invention;
FIG. 5 is a schematic structural diagram of a second detecting component in the screw detecting device according to the present invention;
FIG. 6 is a schematic structural view of the upper surface of the base in the lead screw detecting device according to the present invention;
fig. 7 is a sectional view of a first bearing housing in the lead screw detecting device according to the present invention;
fig. 8 is a schematic structural view of a second mounting seat in the screw rod detecting device according to the present invention;
fig. 9 is a structural view of a second mounting plate in the screw detecting device according to the present invention;
fig. 10 is a schematic structural view of a nut mounting plate in the lead screw detecting device according to the present invention;
fig. 11 is a schematic structural view of a first mounting seat in the screw rod detecting device according to the present invention;
reference numerals:
the test bench 100, the display 200, the base 1, the first detection assembly 2, the detection calibration assembly 3, the second detection assembly 4, the first mounting seat 21, the stepping motor 22, the encoder 23, the second mounting seat 24, the first bearing seat 25, the lead screw 26 to be tested, the nut 27 to be tested, the servo motor 31, the calibration lead screw 32, the calibration nut 33, the second bearing seat 34, the first mounting seat plate 211, the motor mounting plate 212, the support angle seat 213, the connecting shaft 221, the coupling 222, the encoder mounting seat 231, the first slider 232, the first slide rail 233, the limit block 234, the second slide rail 281, the second slider 282, the third slider 283, the third slide rail 351, the fourth slider 352, the fifth slider 353, the second mounting seat 241, the nut mounting plate 242, the notch 2411, the positioning notch 2421, the mounting notch 2422, the bearing base 251, the spring clamp 252, the bearing 253, the clamp spring 254, the grating mounting seat 41, the grating reading head 42, the second mounting seat plate 11, the second mounting seat plate 211, the second mounting plate, the motor mounting seat plate, the motor mounting plate 212, the support plate 213, the support plate, the support angle seat support bracket 213, the positioning notch 2421, the bearing base 2422, the bearing base plate base, the spring clamp 254, and the bearing base plate, A drag chain mounting plate 43, a drag chain 44, a baffle 45, a slot 2111, a mounting hole 2121 and a raised structure 2122.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following describes a lead screw detection device and a monitoring method according to an embodiment of the present invention with reference to the drawings.
As shown in fig. 1 to 10, a lead screw detecting apparatus according to an embodiment of the present invention includes: the device comprises a base 1, a first detection assembly 2, a second detection assembly 4 and a detection calibration assembly 3, wherein the first detection assembly 2 is arranged on the base 1, the first detection assembly 2 is provided with a detected screw rod 26, a detected nut 27 sleeved on the detected screw rod 26 and a stepping motor 22 for driving the detected screw rod 26 to rotate, and the first detection assembly 2 is used for detecting the rotation angle of the stepping motor 22; the second detection component 4 is arranged on the base 1, the second detection component 4 is used for detecting the linear displacement of the detected nut 27, and the detected nut 27 is compensated through the linear displacement and the rotation angle; the detection and calibration component 3 is arranged on the base 1, and the detection and calibration component 3 is used for calibrating the compensated nut 27 to be tested.
In other words, the first detection assembly 2 and the second detection assembly 4 respectively detect the rotation angle of the stepping motor 22 in the screw stepping motor and the linear displacement of the tested nut 27, test multiple sets of data to detect the overall stability of the screw stepping motor, calculate the commutation angle error and compensate, and the detection and calibration assembly 3 detects the linear precision of the screw and verifies the reliability of the screw stepping station data after compensation.
Therefore, the screw rod stepper motor is simple in structure, the first detection assembly 2 is arranged to detect the rotation angle of the stepper motor 22, the second detection assembly 4 is arranged to detect the linear displacement of the detected nut 27, the error is calculated through the comparison of the rotation angle and the linear displacement, the error is compensated to the linear displacement of the detected nut 27, and then the detection and calibration assembly 3 is used for calibration.
Preferably, the lead screw detecting device further includes: the base 1 is placed on the test bench 100, the display 200 is located on the side face of the base 1, electronic components used for controlling the work of the screw rod detection device are placed in the test bench 100, and the display 200 is used for displaying the detected rotation angle, linear displacement and calibration results.
According to one embodiment of the invention, the first detection assembly 2 comprises: the stepping motor comprises a first mounting seat 21, an encoder 23 and a second mounting seat 24, wherein the first mounting seat 21 is fixedly arranged on the base 1, and the stepping motor 22 is fixedly arranged on the first mounting seat 21; the encoder 23 is arranged on the base 1, and the encoder 23 is connected with the stepping motor 22 so as to detect the rotation angle of the stepping motor 22; the second mounting seat 24 is slidably disposed on the base 1, the tested nut 27 is connected to the second mounting seat 24, and the tested nut 27 drives the second mounting seat 24 to reciprocate. That is to say, first mount pad 21 is fixed step motor 22, and the rotation angle of step motor 22 is gathered to encoder 23, and measured nut 27 drives second mount pad 24 and is close to or keep away from first mount pad 21 motion, and the rotation angle data and the linear displacement data homoenergetic that like this lead screw step motor whole work can be gathered.
As shown in fig. 5, the second detecting member 4 includes: the grating mounting seat 41 is arranged on one side of the second mounting seat 24; the grating reading head 42 is installed on the grating installation seat 41, and the grating reading head 42 moves along with the second installation seat 24 through the grating installation seat 41 so as to detect the linear displacement of the measured nut 27; the baffle 45 is vertically arranged on the base 1, the baffle 45 is arranged in parallel to the tested screw rod 26, the drag chain 44 is positioned on the side face of the baffle 45, the drag chain mounting plate 43 is fixedly arranged on the grating mounting seat 41, one end of the drag chain mounting plate 43 is connected with one end of the drag chain 44, and the other end of the drag chain 44 is connected with the base 1. That is to say, when the second detecting component 4 works, because the movement distance of the nut 27 to be detected needs to be detected, the grating reading head 42 is arranged to facilitate accurate measurement, the grating reading head 42 is connected with the electronic components in the test bench 100 through the cable inside the drag chain 44, the drag chain 44 can ensure stable data transmission in the moving process, and meanwhile, the cable is protected, and the detection result is prevented from being influenced by complicated and intertwined connected lines.
According to one embodiment of the invention, the detection calibration assembly 3 comprises: the servo motor 31, the calibration screw rod 32 and the calibration nut 33, wherein the servo motor 31 is fixedly arranged on the first mounting seat 21; one end of the calibration screw rod 32 is directly connected with the servo motor 31, and the other end of the calibration screw rod 32 is connected with the base 1 through a second bearing seat 34; the calibration screw rod 32 is sleeved with the calibration nut 33, the calibration nut 33 is connected with the second mounting seat 24, and the calibration nut 33 drives the second mounting seat 24 to reciprocate. Compared with the stepping motor 22, the servo motor 31 has almost no commutation error during commutation, so that the screw rod servo motor can be used as a calibration template, the servo motor 31 and the stepping motor 22 are both fixed on the first mounting seat 21, and the calibration nut 33 and the measured nut 27 are both fixed on the second mounting seat 24, so that the independent work between the servo motor 31 and the stepping motor 22 can be realized, and simultaneously, a set of system is shared, thereby reducing the manufacturing cost.
Further, the second bearing seat 34 is slidably connected to the base 1, and the sliding directions of the second bearing seat 34 and the second mounting seat 24 are parallel to the calibration screw 32. That is to say, one end of the calibration screw 32 is directly connected to the servo motor 31, and the other end of the calibration screw 32 is slidingly arranged on the base 1 through the second bearing seat 34, so that on one hand, when screws with different length and size are tested, the second bearing seat 34 can be slid to be adapted, on the other hand, the axial acting force of the calibration screw 32 can be dissipated, the circumferential rotation of the calibration screw 32 and the linear motion of the calibration nut 33 are prevented from being influenced by the axial acting force, and therefore the accuracy and reliability of the test result are ensured.
Furthermore, the encoder 23 is connected with the base 1 in a sliding manner, one end of the lead screw 26 to be tested is directly connected with the stepping motor 22, the other end of the lead screw 26 to be tested is connected with the base 1 through the first bearing seat 25, the first bearing seat 25 is connected with the base 1 in a sliding manner, and the sliding directions of the first bearing seat 25, the second mounting seat 24 and the encoder 23 are all parallel to the lead screw 26 to be tested. On the one hand, when testing lead screws with different length and size, the first bearing seat 25 can be slid to be adapted, on the other hand, the axial acting force of the tested lead screw 26 can be dissipated, the axial acting force is prevented from influencing the circumferential rotation of the tested lead screw 26 and the linear motion of the tested nut 27, and therefore the accuracy and reliability of the test result are ensured.
As shown in fig. 6, two parallel positioning grooves are formed in the base 1, a first slide rail 233 and a second slide rail 281 are arranged in each positioning groove, the first slide rail 233 is located on one side of the first mounting seat 21, a first slide block 232 is slidably arranged on the first slide rail 233, the first slide block 232 is connected with the encoder 23, the second slide rail 281 is located on the other side of the first mounting seat 21, a second slide block 282 and a third slide block 283 are slidably arranged on the second slide rail 281, the second slide block 282 is connected with the first bearing seat 25, and the third slide block 283 is connected with the second mounting seat 24; a third slide rail 351 is arranged in the other positioning groove, a fourth slide block 352 and a fifth slide block 353 are arranged on the third slide rail 351 in a sliding manner, the fourth slide block 352 is connected with the second bearing seat 34, and the fifth slide block 353 is connected with the second mounting seat 24. The positioning groove can facilitate the positioning and fixing of the first sliding rail 233, the second sliding rail 281 and the third sliding rail 351, and meanwhile, the first sliding rail 233, the second sliding rail 281 and the third sliding rail 351 are ensured to be parallel to each other.
Further, the end portions of the first slide rail 233, the second slide rail 281, and the third slide rail 351 are all provided with a limit block 234.
Preferably, the first bearing seat 25 and the second bearing seat 34 are identical in structure, the first bearing seat 25 comprising: a bearing base 251, a spring clamp 252, a bearing 253 and a clamp spring 254, wherein the bearing base 251 is arranged on the second sliding block 282; the spring clamp 252 is arranged on the bearing base 251, and one end of the spring clamp 252 is connected with the other end of the tested screw rod 26; the bearing 253 is arranged between the bearing base 251 and the spring clamp 252; the clamp spring 254 is located between the bearing base 251 and the spring clip 252, and the clamp spring 254 is located on one side of the bearing 253. The spring clamp 252 facilitates clamping the end of the lead screw 26, and the bearing 253 can ensure smooth rotation of the lead screw 26.
According to an embodiment of the present invention, the encoder 23 is disposed on the first slider 232 through the encoder mounting seat 231, the encoder 23 is directly connected to one end of the connecting shaft 221 through the coupling 222, and the other end of the connecting shaft 221 is connected to the stepping motor 22. That is, the encoder 23 is movable in the axial direction of the stepping motor 22, and when the rotation angle of the stepping motor 22 is detected, the encoder 23 is prevented from being applied with an axial force, thereby improving the detection accuracy.
According to one embodiment of the present invention, first mount 21 includes: the first installation seat plate 211, the motor installation plate 212 and the supporting angle seat 213, wherein the first installation seat plate 211 is arranged on the base 1; the motor mounting plate 212 is detachably connected with the first mounting seat plate 211, and the stepping motor 22 is connected with the motor mounting plate 212; one side of the supporting angle seat 213 is connected to the first installation seat plate 211, and the other side of the supporting angle seat 213 is connected to the base 1. Furthermore, a groove 2111 for the tested screw rod 26 to pass through is formed in the first mounting seat plate 211, a mounting hole 2121 is formed in the motor mounting plate 212, an edge of the mounting hole 2121 protrudes to form a protruding structure 2122, and the protruding structure 2122 is matched with the groove 2111, so that the motor mounting plate 212 and the first mounting seat plate 211 can be conveniently positioned and mounted.
As shown in fig. 8 to 10, the second mount 24 includes: the nut mounting plate 242 is arranged on the second mounting base plate 241, and a notch 2411 is arranged on the second mounting base plate 241; the nut mounting plate 242 is detachably connected to the second mounting base plate 241, a positioning stop 2421 is disposed on one side of the nut mounting plate 242 facing the second mounting base plate 241, and the positioning stop 2421 is clamped in the slot 2411. Preferably, the slot 2411 is U-shaped, the positioning stop 2421 is semi-annular, and the outer peripheral surface of the positioning stop 2421 is matched with the bottom surface of the slot 2411, so that the positioning stop can be quickly mounted from top to bottom.
The invention also discloses a detection method of the screw rod detection device, which comprises the following steps: when the stepping motor 22 starts to rotate, the second detection component 4 acquires a displacement parameter of the detected nut 27 every time the detected nut 27 moves for a certain distance, and meanwhile, the first detection component 2 acquires a corresponding angle parameter of the stepping motor 22; step two: setting a theoretical angle parameter, and changing the rotation direction of the stepping motor 22, wherein at the moment, the first detection assembly 2 acquires an actual angle parameter when the stepping motor 22 is reversed; step three: calculating an angle error between the actual angle parameter and the theoretical angle parameter, converting the angle error into a displacement error, compensating the displacement error to the movement process of the measured nut 27, repeating the first step and the second step, and collecting the compensated displacement parameter of the measured nut 27; step four: the screw rod 26 to be detected and the nut 27 to be detected are arranged on the detection and calibration component 3, the servo motor 31 starts to rotate, the detection and calibration component 3 collects a displacement parameter of the nut 27 to be detected when the nut 27 to be detected moves for a certain distance, and meanwhile, the servo motor 31 provides a corresponding angle parameter; step five: comparing the displacement parameters of the measured nut 27 in the fourth step with the displacement parameters of the measured nut 27 compensated in the third step, judging that the error compensation is successful if the deviation is smaller than a set value after the comparison, uploading and storing all data in the first step to the fourth step after the compensation is successful for a technician to analyze, and re-performing the first step to the fifth step if the judgment and the compensation are failed.
Further, in the third step, the first step is repeated for a plurality of times, a plurality of sets of displacement parameters and angle parameters are recorded, and whether the overall stability formed by the stepping motor 22, the tested screw rod 26 and the tested nut 27 is qualified or not is judged according to the plurality of sets of displacement parameters and angle parameters. After a plurality of tests, if a plurality of sets of displacement parameters and angle parameters are within a reasonable error range, the whole body formed by the stepping motor 22, the tested lead screw 26 and the tested nut 27 keeps high stability during working, and if the errors among the plurality of sets of displacement parameters and angle parameters are large, the movement of the tested nut 27 on the tested lead screw 26 or the rotation of the stepping motor 22 is unstable.
Still further, the method also comprises the step six: and repeating the step four for multiple times, recording a plurality of displacement parameters, and judging whether the stability between the tested screw rod 26 and the tested nut 27 is qualified or not according to the plurality of displacement parameters. After a plurality of tests, if a plurality of displacement parameters are in a reasonable range, it can be determined that the stability between the tested screw rod 26 and the tested nut 27 is better.
In other words, in the steps one to three, the error of the stepping motor 22 when the rotation direction is changed is collected through the encoder 23, and the error is compensated to the linear motion process of the measured nut 27; in the fourth step, the stepping motor 22 is changed into the servo motor 31, and since the servo motor 31 has almost no steering error, the displacement parameter of the measured nut 27 in the fourth step only includes the error between the measured nut 27 and the measured screw rod 26; and after comparing the displacement parameters of the measured nut 27 in the fourth step with the displacement parameters of the measured nut 27 compensated in the third step, if the deviation after comparison is smaller than a set value, judging that the error compensation is successful, and otherwise, performing re-compensation.
Further, before the first step, the calibration nut 33 and the calibration screw 32 are installed on the detection and calibration assembly 3, and when the calibration nut 33 moves for a certain distance, the detection and calibration assembly 3 acquires a displacement parameter of the calibration nut 33, and meanwhile, the servo motor 31 provides a corresponding angle parameter, and after repeating for multiple times, calibration data is obtained, and the detection precision of the screw detection device is evaluated according to the calibration data. That is, the error of the calibration nut 33 and the calibration screw 32 is known, and after the screw detecting device is used for a certain time, if the obtained calibration data matches the known error, the inspection accuracy of the screw detecting device is normal, otherwise, the screw detecting device needs to be maintained and repaired.
The invention also discloses a computer storage medium which comprises one or more computer instructions, and the one or more computer instructions realize the detection method when being executed.
The invention also discloses an electronic device, comprising a memory and a processor, wherein the memory is used for storing one or more computer instructions; the processor is used for calling and executing one or more computer instructions so as to realize the detection method.
The invention adopts double-station time-sharing detection, which can detect the precision of the detected screw rod 26 and the detected nut 27 and can also detect the integral linear precision and the circumferential precision of the screw rod stepping motor after the whole machine is assembled, thereby being more beneficial to analyzing the linear precision of the whole screw rod stepping motor;
the invention adopts the first detection assembly 2 and the second detection assembly 4, the two detection assemblies can independently operate, the first detection assembly 2 carries out the complete machine linear precision evaluation of the screw rod stepping motor, the encoder 23 feeds back the circumferential angle deviation generated in the operation process and compensates the complete machine linear precision of the screw rod stepping motor, and the operation precision is improved. The second detection assembly 4 can perform a second fitting comparison test on the linear precision of the screw rod stepping motor after compensation is completed, so that the reliability of data after compensation of the first detection assembly 2 is calibrated.
According to the invention, the precision detection of the screw rod and the precision detection of the whole screw rod stepping motor are integrated, a set of test system and a test platform are shared in double stations, the test operation is simplified, the equipment cost is reduced, a set of control interface and control program are shared, and a set of grating mechanism is structurally shared, so that the cost and the operation are more saved and the operation is more convenient, and the two stations share the same mounting base plate and mounting seat.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (15)
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| CN110530637A (en) * | 2019-08-29 | 2019-12-03 | 北京吾天科技有限公司 | Planetary roller screw dynamic property general-utility test platform |
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| EP0090504A1 (en) * | 1982-03-04 | 1983-10-05 | DAVID PARR & ASSOCIATES LIMITED | Spooling machines |
| CN101907441A (en) * | 2009-06-03 | 2010-12-08 | 上海莱恩精密机床附件有限公司 | Laser Pitch Measuring Instrument for Ball Screw and Its Measuring Method |
| CN104776992A (en) * | 2015-04-24 | 2015-07-15 | 南京理工大学 | Planetary roller lead screw precision testing device |
| CN107957679A (en) * | 2017-11-28 | 2018-04-24 | 武汉理工大学 | A kind of automatic rudder system based on high-precision screw stepper motor and self-setting PID arithmetic |
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