CN218874759U - Numerical control machine tool original station precision detection device - Google Patents
Numerical control machine tool original station precision detection device Download PDFInfo
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- CN218874759U CN218874759U CN202222995257.8U CN202222995257U CN218874759U CN 218874759 U CN218874759 U CN 218874759U CN 202222995257 U CN202222995257 U CN 202222995257U CN 218874759 U CN218874759 U CN 218874759U
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Abstract
The utility model relates to a digit control machine tool former station precision detection device, it includes linear motion composite unit, laser distance sensor unit, work piece rotation angle detection device and machine tool control system, linear motion composite unit includes X to linear motion device, Y to linear motion device, and X is to linear motion device, Y to linear motion device and be straight cylinder type linear motion device, and X is adorned in Y to the motion axle of linear motion device admittedly, and Y is adorned in workstation base one side admittedly to linear motion device admittedly; fixedly mounting a laser distance sensor unit on a moving shaft of the X-direction linear motion device; the workpiece rotation angle detection device is arranged on a rotation table surface of the workbench. The utility model discloses former station precision detection device of digit control machine tool, X, Y have high horizontal motion precision to linear motion device, reach the purpose that improves gear shaping processing work piece precision, especially the effect is obvious in the aspect of radial feed error optimization.
Description
Technical Field
The utility model belongs to the technical field of the digit control machine tool, especially a former station precision detection device of digit control machine tool.
Background
The gear is a key transmission part of large and heavy equipment and precision equipment, and the gear shaping is an important process method for processing a cylindrical gear, particularly an internal gear. The high-precision transmission device has higher and higher requirements on the precision of the gear, and precision elements such as the tooth pitch accumulated tolerance Fp of the gear, the radial runout tolerance Fr of the gear ring and the like are required to reach the national standard grade 4 or above by the precision gear; due to the limitation of diameter specifications, a precise gear grinding machine capable of machining the inner cylindrical gear is not developed at present, and the machining precision can only be guaranteed by a gear shaping machining method. The conventional gear shaping machining precision can reach the national standard 6 grade, and obviously, the machining requirement cannot be met; therefore, it is necessary to study a high-precision gear cutting method and auxiliary equipment therefor.
Under the influence of various factors such as machine tool part machining and assembling precision, machine tool control precision, machine tool stability and the like, the gear shaping machine with higher precision is difficult to research and develop. On the basis of the prior art, an original station precision detecting instrument based on a numerical control machine tool is developed, the machining potential of a gear shaping machine is excavated, the machining precision is further improved, and the method becomes an important research direction in the field of precision gear machining.
The current gear machining inspection methods comprise two methods:
the first method is that after the machining is finished, the workpiece is transferred to a three-coordinate gear precision detector for machining, and after the detection is finished, the precision value of the gear workpiece is obtained, so that the machining process cannot be improved, the machining precision cannot be improved, and the required working hours are long; in the process of transferring the workpiece from the machine tool to the detector, the detection positioning reference has slight change, and the detection numerical value has a certain error with the true value.
The second method is original station measurement, after the workpiece is processed, a method of adding an online measuring probe on an original motion shaft of a machine tool is utilized, and simultaneously, the motion of a numerical control shaft is utilized to detect the processing precision of the workpiece by utilizing a contact type measuring probe.
At present, the higher processing demand of former station precision detection to the gear shaping: one is to minimize the effect of raw errors in gear accuracy measurements caused by using raw motion axes as the axes of motion detection. And secondly, the machining precision of the gear workpiece can be detected, and a suggested optimization direction can be provided for the optimized machining process.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a former station precision detection device of digit control machine tool, can realize the position of awaiting measuring that removes the work piece with the measuring instrument is accurate, improve displacement accuracy nature, reduce displacement error, guarantee the work piece and measure accuracy nature.
The utility model provides a its technical problem realize through following technical scheme:
a numerical control machine original station precision detection device comprises a linear motion combined unit, a laser distance sensor unit, a workpiece rotation angle detection device and a machine tool control system, wherein the linear motion combined unit (1) comprises an X-direction linear motion device and a Y-direction linear motion device, the X-direction linear motion device and the Y-direction linear motion device are straight-cylinder linear motion devices, the X-direction linear motion device is fixedly arranged on a motion shaft of the Y-direction linear motion device, and the Y-direction linear motion device is fixedly arranged on one side of a workbench base; a laser distance sensor unit is fixedly arranged on a moving shaft of the X-direction linear motion device; the workpiece rotation angle detection device is arranged on a rotation table surface of the workbench; the X-direction linear motion device and the Y-direction linear motion device collect displacement signals in the X direction and the Y direction and transmit the displacement signals to a machine tool control system; the workpiece rotation angle detection device collects a workpiece rotation angle signal and transmits the workpiece rotation angle signal to a machine tool control system; the laser distance sensor unit collects a workpiece detection distance signal and transmits the workpiece detection distance signal to the machine tool control system.
Moreover, the straight-cylindrical linear motion device comprises a nut component, a lead screw component and a power component;
the nut assembly comprises a ball nut, a moving shaft and a magnetostrictive displacement sensor; the two ends of the moving shaft are provided with holes which are blind holes, one end of the moving shaft is a long inner hole, and the other end of the moving shaft is a short inner hole; the ball nut is fixedly arranged in the inner hole of the moving shaft length through a bolt; the magnetostrictive displacement sensor is installed in the short inner hole of the moving shaft through threaded connection;
the screw assembly comprises a ball screw, a mounting frame, a screw driving bearing, a rolling bearing, a pressing assembly and an end sealer; the ball screw is inserted into the long inner hole of the moving shaft and matched with the ball nut; the outer ring of the screw rod driving bearing is fixedly arranged on the mounting frame through a bolt, and the inner ring of the screw rod driving bearing is fixed at the rear end of the ball screw through transition fit; the rolling bearing is fixed at the rear end of the ball screw in a transition fit manner; the end sealer is fixedly arranged at the front end part of the ball screw through a bolt; the detection end of the magnetic telescopic displacement sensor is coaxially arranged in a ball screw;
the power assembly comprises a servo motor, a speed reducer, a coupler and a first protective cover; the upper end of the first protective cover is fixedly arranged at the rear end of the mounting frame through a bolt, and the rear part of the first protective cover is fixedly arranged on the speed reducer through a bolt; the coupler is connected with the ball screw and the output shaft of the speed reducer; the servo motor is fixedly arranged at the input end of the speed reducer through a bolt; the power assembly is used for driving and transmitting the cylindrical linear motion device.
And the mounting frame is a square shell with a hollow structure, the diameter of the interior of the mounting frame is the same as that of the moving shaft, and the mounting frame is matched with the moving shaft and used for the axial movement of the moving shaft in the mounting frame.
Moreover, the pressing components are 8 groups and are arranged between the mounting frame and the moving shaft in four directions; comprises a bolt, a spring and a solid ball; the mounting frame is provided with a through bolt hole, a bolt and a bolt compression spring are mounted in the bolt hole, a solid ball is arranged at the upper end of the spring, four uniformly distributed arc-shaped guide grooves are axially formed in the outer side surface of the moving shaft, the radius of each arc-shaped guide groove is equal to that of each solid ball, and each solid ball is clamped into each arc-shaped guide groove (121) so as to be matched with the compression assembly.
And the upper half part of the outer side of the mounting frame is chamfered and is provided with 8 uniformly distributed threaded holes, and the bolts of the 8 groups of pressing assemblies are matched with the threaded holes on the chamfer.
Moreover, the outer side surface of the moving shaft is longitudinally provided with an oil guide groove which is communicated with the arc-shaped guide groove; for lubricating the moving shaft.
And, ball nut suit is on ball to with ball cooperation, be used for realizing converting the rotary motion of ball to ball nut's linear motion.
And the ball screw is internally provided with a blind hole, the depth of the blind hole is slightly longer than the length of the detection end of the magnetostrictive displacement sensor, and the blind hole is matched with the detection end of the magnetostrictive displacement sensor and used for feeding back displacement information when a moving shaft moves.
The workpiece rotation angle detection device is configured such that: the steel grid ruler base ring is installed on a rotary table top of a workbench through evenly distributed bolts and T-shaped nuts, the steel grid ruler is sleeved on the steel grid ruler base ring, the second protective cover is installed on the steel grid ruler base ring, the steel grid ruler detection head is installed on a steel grid ruler detection head base, and the steel grid ruler detection head and the steel grid ruler are kept at a reasonable distance.
The utility model discloses an advantage and beneficial effect do:
1. according to the numerical control machine original station precision detection device, in the gear shaping processing process, a laser distance sensor is used for scanning the surface in the cutting process, an X-direction linear motion device and a Y-direction linear motion device acquire X-direction and Y-direction displacement signals, and a workpiece rotation angle detection device acquires a workpiece rotation angle; transmitting the acquired signals to a machine tool control system; the X-direction linear motion device has extremely high horizontal motion precision, a cutting state mathematical model is established and is compared with a gear machining process mathematical model in a theoretical state, machining errors are calculated, targeted correction is carried out on the errors through a control system, the purpose of improving the precision of a gear shaping machining workpiece is achieved, and the effect is obvious particularly in the aspect of radial feeding error optimization.
2. The utility model discloses former station precision detection device of digit control machine tool, its tube-shape linear motion device adopts nut component, screw assembly and power component, and power component's servo motor passes through the reduction gear back drive ball and rotates to realize the horizontal displacement of axis of motion through ball nut, realize high accuracy, steady displacement under screw drive bearing, antifriction bearing's cooperation, be difficult for leading to the wearing and tearing of the too fast acceleration part of speed.
3. The utility model discloses a numerical control machine original station precision detection device, a tubular linear motion device and a compression assembly of the device comprise a bolt, a spring and a solid ball; the lower end of the spring is provided with a bolt, the upper end of the spring is provided with a solid ball, four uniformly distributed arc-shaped guide grooves are axially formed in the outer side surface of the moving shaft, the radius of each arc-shaped guide groove is equal to that of the solid ball, so that the arc-shaped guide grooves are matched with the solid ball, the solid ball enables the moving shaft to move only in a straight line in the mounting frame through pressing force and cannot rotate circumferentially, and the moving shaft does not rotate circumferentially.
4. The utility model discloses former station precision detection device of digit control machine tool, its tube-shape linear motion device, mounting bracket outside the first half chamfer to open the screw hole that has 8 equipartitions, 8 group compress tightly the bolt of subassembly and the screw hole cooperation installation on the chamfer, are convenient for realize on bolt and the mounting bracket screw hole compress tightly the installation.
5. The utility model discloses the former station precision detection device of digit control machine tool, its tube-shape linear motion device through setting up the magnetostrictive displacement sensor for the detection precision is carried by a wide margin; the ball screw is internally provided with a blind hole, the depth of the blind hole is slightly longer than the length of the detection end of the magnetostrictive displacement sensor, and the blind hole is matched with the detection end of the magnetostrictive displacement sensor and used for feeding back displacement information when a moving shaft moves.
6. The utility model discloses former station precision detection device of digit control machine tool, X, Y have high horizontal motion precision to the linear motion device, through establishing cutting state mathematical model, compare with theoretical state's gear machining process mathematical model, calculate machining error, carry out the target correction to the error through control system, reach the purpose that improves gear shaping processing work piece precision, especially the effect is obvious in the aspect of radial feed error optimization.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic structural view of the linear motion combined unit of the present invention;
FIG. 3 is a schematic view of the overall structure of the cylindrical linear motion device of the present invention;
fig. 4 is a sectional view of the cylindrical linear motion device of the present invention;
FIG. 5 is a partial enlarged view of A in FIG. 4;
FIG. 6 is a schematic view showing the structure of the moving shaft of the present cylinder linear motion device;
fig. 7 is a schematic structural diagram of a laser distance sensor unit according to the present invention;
fig. 8 is a schematic structural view of the workpiece rotation angle detection apparatus of the present invention;
fig. 9 is a sectional view of the workpiece rotation angle detecting device of the present invention;
fig. 10 is a partially enlarged view of a portion B in fig. 9.
In the figure:
1-linear motion combined unit, 2-laser distance sensor unit, 3-workpiece rotation angle detection device, 4-workbench base, 5-rotation table surface, 6-clamp, 7-workpiece, 8-X direction linear motion device, 9-Y direction linear motion device, 10-mounting rack and 11-flange plate;
110-ball nut, 120-motion shaft, 130-magnetostrictive displacement sensor;
210-ball screw, 220-mounting rack, 230-screw drive bearing, 240-rolling bearing, 250-pressing component, 251-bolt, 252-spring, 253-solid ball and 260-end sealer;
310-servo motor, 320-reducer, 330-coupler, 340-protective cover.
21-a laser distance sensor, 22-a sensor mounting base;
31-T-shaped nut, 32-steel grid ruler base ring, 33-second protective cover, 34-steel grid ruler, 35-steel grid ruler detection head and 36-steel grid ruler detection head base.
Description of the preferred embodiment
The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only, and are not intended to be limiting, and the scope of the present invention should not be limited thereby.
An original station precision detection device of a numerical control machine tool is shown in figures 1 and 2 and comprises a linear motion combined unit 1, a laser distance sensor unit 2, a workpiece rotation angle detection device 3 and a machine tool control system, wherein the linear motion combined unit 1 comprises an X-direction linear motion device 8, a Y-direction linear motion device 9,X, a linear motion device 8 and a Y-direction linear motion device 9 which are all straight-barrel type linear motion devices, the X-direction linear motion device 8 is fixedly arranged on a motion shaft of the Y-direction linear motion device 9, and the Y-direction linear motion device is fixedly arranged on one side of a workbench base 4 through a mounting frame 10; a laser distance sensor unit 2 is fixedly arranged on a moving shaft of the X-direction linear motion device 8; the workpiece rotation angle detection device 3 is arranged on a rotation table surface 5 of the workbench; the X-direction linear motion device 8 and the Y-direction linear motion device 9 collect displacement signals in the X direction and the Y direction and transmit the displacement signals to a machine tool control system; the workpiece rotation angle detection device 3 collects a workpiece rotation angle signal and transmits the workpiece rotation angle signal to a machine tool control system; the laser distance sensor unit 2 collects a workpiece detection distance signal to a machine tool control system. The end part of the motion shaft of the Y-direction linear motion device and the mounting frame of the X-direction linear motion device 8 are fixedly mounted through a flange plate 11.
The cylindrical linear motion device, as shown in fig. 3-6, includes a nut assembly, a screw assembly and a power assembly; the nut assembly 100 includes a ball nut 110, a moving shaft 120, a magnetostrictive displacement sensor 130; holes are formed in both ends of the moving shaft 120 and are blind holes, one end of the moving shaft is a long inner hole, the other end of the moving shaft is a short inner hole, and a through hole internal thread is formed in the center of the joint of the two holes; the ball nut 110 is fixedly installed in the long inner hole of the moving shaft 120 through a bolt; the magnetostrictive displacement sensor 130 is installed in the short inner hole of the moving shaft 120 through threaded connection;
the screw assembly 200 includes a ball screw 210, a mounting bracket 220, a screw drive bearing 230, a rolling bearing 240, 8 sets of hold down assemblies 250, and an end sealer 260; the ball screw 210 is inserted into the long inner hole of the moving shaft to be matched with the ball nut 110; the outer ring of the screw drive bearing 230 is fixedly arranged on the mounting frame 220 through a bolt, and the inner ring of the screw drive bearing 230 is fixed at the rear end of the ball screw 210 through transition fit; the rolling bearing 240 is fixed at the rear end of the ball screw 210 through transition fit; the end sealer 260 is fixedly mounted on the front end of the ball screw 210 by bolts; the detection end of the magnetic telescopic displacement sensor 130 is coaxially arranged in the ball screw 210;
the power assembly 300 comprises a servo motor 310, a speed reducer 320, a coupling 330 and a first protective cover 340; the upper end of the first shield 340 is fixedly mounted at the rear end of the mounting frame 220 through a bolt, and the rear part of the first shield is fixedly mounted on the reducer 320 through a bolt; the coupling connects the ball screw 210 and the output shaft of the reducer 320; the servo motor 310 is fixedly arranged at the input end of the speed reducer 320 through a bolt; the power assembly is used for driving and transmitting the cylindrical linear motion device. The power assembly is used for driving and transmitting the cylindrical linear motion device. Through power component, provide suitable power for tube-shape linear motion device, be difficult for leading to the wearing and tearing of the too fast acceleration part of speed.
The mounting bracket 220 is a square housing with a hollow structure, the inside of which has the same diameter as the moving shaft 120, and is engaged with the moving shaft 120 for the moving shaft to move axially in the mounting bracket.
The pressing assemblies 250 are 8 groups and are installed between the mounting frame 220 and the moving shaft 120 in four directions; comprises a bolt 251, a spring 252 and a solid round ball 253; the mounting frame 220 is provided with a through bolt hole, a bolt 251 is arranged in the bolt hole, the bolt 251 compresses a spring 252, the upper end of the spring 252 is provided with a solid round ball 253, the outer side surface of the moving shaft 120 is axially provided with four uniformly distributed arc-shaped guide grooves 121, the radius of the arc-shaped guide grooves is equal to that of the solid round ball 253, and the solid round ball 253 is clamped in the arc-shaped guide grooves 121 so as to be matched with the compressing assembly 250.
The upper half part of the outer side of the mounting frame 220 is chamfered and is provided with 8 uniformly distributed threaded holes, and the bolts 251 of the 8 groups of pressing assemblies 250 are matched with the threaded holes on the chamfer.
An oil guide groove 122 is longitudinally arranged on the outer side surface of the moving shaft 120, and the oil guide groove 122 is communicated with the arc-shaped guide groove 121; for lubrication of the moving shaft 120.
The ball nut 110 is installed on the ball screw 210 in a sleeving manner, and is engaged with the ball screw 210, so as to convert the rotational motion of the ball screw 210 into the linear motion of the ball nut 110. The movement of the ball screw 210 and the ball nut 110 is the main movement of the present invention, and all measures to improve the precision are to reduce the error caused by the main movement.
The ball screw 210 is provided with a blind hole therein, the depth of the blind hole is slightly longer than the length of the detection end of the magnetostrictive displacement sensor 130, and the blind hole is matched with the detection end of the magnetostrictive displacement sensor 130 and used for feeding back displacement information when the moving shaft 120 moves.
The flange at the end of the moving shaft 120 is provided with a plurality of threaded holes, so that the two devices can be matched for use, and the movement in multiple directions can be realized. When the two devices are used in a matched manner, the translation in the X, Y direction can be realized, and the rotating motion of the main shaft is added, so that more detection points in on-machine detection can be realized, and the detection precision is further improved.
The motion method of the cylindrical linear motion device comprises the following steps:
s1: the ball screw 210 is engaged with the ball nut 110;
s2: the ball nut 110 is fixedly connected with the moving shaft 120;
s3: the power assembly 300 rotates the ball screw 210, thereby moving the ball nut 110 and the moving shaft 120 linearly, and the pressing force of the pressing assembly 250 prevents the circumferential rotation.
The ball screw 210 and the mounting bracket 220 are connected by a screw drive bearing 230. In which the ball screw 210 is engaged with the ball nut 110, and the mounting bracket 220 is engaged with the moving shaft 120 through the pressing assembly 250. Meanwhile, the ball nut 110 and the moving shaft 120 are fastened together by bolt installation, and a closed loop is realized. The auxiliary element rolling bearing 240, the end sealer 260, the sensing element magnetostrictive displacement sensor 130 and the power assembly 300 jointly constitute the present invention. When the power assembly 300 drives the ball screw 210 to start rotating, the pressing assembly 250 presses the axial guide groove 121 on the moving shaft 120, so that the ball nut 110 is forced to drive the moving shaft 120 to move linearly and not to rotate circularly. The tail end of the moving shaft is provided with a magnetic telescopic displacement sensor, so that the linear displacement of the detection device is detected when the workpiece is detected.
The laser distance sensor device comprises a laser distance sensor 21 and a sensor mounting base 22, and the laser distance sensor 21 is fixedly mounted with the end part of the movement shaft of the X-direction linear movement device 8 through the sensor mounting base 22.
The structure of the workpiece rotation angle detection device 3 is shown in fig. 8 and 9: install on workstation revolving stage face 5 through the bolt 37 and the 31 steel grid chi base ring 32 of T type nut of equipartition, steel grid chi 34 suit is on steel grid chi base ring 32, and second protection casing 33 is installed on steel grid chi base ring 32, and steel grid chi detects head 35 and installs on steel grid chi detects head base 36, and steel grid chi detects head 35 and steel grid chi 34 and keeps reasonable distance.
The working principle of the device for detecting the precision of the original station of the numerical control machine tool is as follows:
the rotary table top 5 of the working table and the base 4 of the working table form a rotary working table of the numerical control machine, and a Y-direction linear motion device 9 which is vertically arranged is arranged on the base 4 of the working table; installing a horizontally arranged X-direction linear motion device 8 on a motion shaft flange of a vertically arranged precise linear motion device 1; the laser distance sensor device 2 is arranged on a moving shaft flange of the X-direction linear motion device 8; installing a steel grating ruler base circular ring 32 of a workpiece rotation angle detection device 3 on a workbench rotation table top 4, and installing a steel grating ruler detection head base 36 of the workpiece rotation angle detection device 3 on a workbench base 4; the fixture 6 is arranged on the workbench base 4, and the workpiece 7 is arranged on the fixture 6; the workpiece 7, the clamp 6, the worktable rotary table surface 5 and the steel grating ruler base ring 32 of the workpiece rotary angle detection device 3 form a relatively fixed and concentric rotary part. According to different machining functions of the machine tool, the workpiece can be a cylinder, a circular rotary part, a cylindrical gear and other parts of different types.
And after the machining is finished, starting a detection flow at the original station without disassembling the workpiece. The machine tool control system controls the servo motors of the horizontally arranged X-direction linear motion device 8 and the vertically arranged Y-direction linear motion device 9 to rotate, so that the laser distance sensor 21 is close to the workpiece 7 to a reasonable distance. The machine tool control system controls the workbench servo motor to rotate, so that the workbench rotary table surface 5 rotates, and further the workpiece 7 is driven to rotate.
In the rotating process, the data acquisition system is used for simultaneously acquiring data of a magnetostrictive displacement sensor of the horizontally arranged X-direction linear motion device 8, data of a magnetostrictive displacement sensor of the vertically arranged Y-direction linear motion device 9, data of the laser distance sensor 2 and data of a steel grating ruler of the workpiece rotation angle detection device 3; and finishing the precision detection calculation.
Although the embodiments of the present invention and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, alterations, and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and thus the scope of the invention is not limited to the embodiments and drawings disclosed.
Claims (9)
1. The utility model provides an former station precision detection device of digit control machine tool which characterized in that: the device comprises a linear motion combined unit (1), a laser distance sensor unit (2), a workpiece rotation angle detection device (3) and a machine tool control system, wherein the linear motion combined unit (1) comprises an X-direction linear motion device (8) and a Y-direction linear motion device (9), the X-direction linear motion device (8) and the Y-direction linear motion device (9) are both straight-cylinder linear motion devices, the X-direction linear motion device (8) is fixedly arranged on a motion shaft of the Y-direction linear motion device (9), and the Y-direction linear motion device is fixedly arranged on one side of a workbench base (4); a laser distance sensor unit (2) is fixedly arranged on a moving shaft of the X-direction linear motion device (8); the workpiece rotation angle detection device (3) is arranged on a rotation table surface (5) of the workbench; the X-direction linear motion device (8) and the Y-direction linear motion device (9) collect displacement signals in the X direction and the Y direction and transmit the displacement signals to a machine tool control system; the workpiece rotation angle detection device (3) collects workpiece rotation angle signals to a machine tool control system; the laser distance sensor unit (2) collects a workpiece detection distance signal and transmits the workpiece detection distance signal to a machine tool control system.
2. The numerical control machine tool original station precision detection device according to claim 1, characterized in that: the straight-tube linear motion device comprises a nut component, a screw rod component and a power component;
the nut assembly (100) comprises a ball nut (110), a moving shaft (120), and a magnetostrictive displacement sensor (130); the two ends of the moving shaft (120) are provided with blind holes, one end of the moving shaft is a long inner hole, and the other end of the moving shaft is a short inner hole; the ball nut (110) is fixedly arranged in the long inner hole of the moving shaft (120) through a bolt; the magnetostrictive displacement sensor (130) is installed in the short inner hole of the moving shaft (120) through threaded connection;
the screw assembly (200) comprises a ball screw (210), a mounting bracket (220), a screw drive bearing (230), a rolling bearing (240), a compression assembly (250) and an end sealer (260); the ball screw (210) is inserted into the long inner hole of the moving shaft and matched with the ball nut (110); the outer ring of the screw rod driving bearing (230) is fixedly arranged on the mounting frame (220) through a bolt, and the inner ring of the screw rod driving bearing (230) is fixed at the rear end of the ball screw (210) through transition fit; the rolling bearing (240) is fixed at the rear end of the ball screw (210) through transition fit; the end sealer (260) is fixedly arranged at the front end part of the ball screw (210) through a bolt; the detection end of the magnetostrictive displacement sensor (130) is coaxially arranged in a ball screw (210);
the power assembly (300) comprises a servo motor (310), a speed reducer (320), a coupling (330) and a first protective cover (340); the upper end of the first protective cover (340) is fixedly arranged at the rear end of the mounting frame (220) through a bolt, and the rear part of the protective cover is fixedly arranged on the speed reducer (320) through a bolt; the coupling is connected with the ball screw (210) and the output shaft of the speed reducer (320); the servo motor (310) is fixedly arranged at the input end of the speed reducer (320) through a bolt; the power assembly is used for driving and transmitting the cylindrical linear motion device.
3. The device for detecting the precision of the original station of the numerical control machine tool as claimed in claim 2, characterized in that: the mounting rack (220) is a square shell with a hollow structure, the diameter of the interior of the square shell is the same as that of the moving shaft (120), and the square shell is matched with the moving shaft (120) and used for enabling the moving shaft to axially move in the mounting rack.
4. The device for detecting the precision of the original station of the numerical control machine tool as claimed in claim 2, wherein: the pressing assemblies (250) are 8 groups and are arranged between the mounting frame (220) and the moving shaft (120) in four directions; comprises a bolt (251), a spring (252) and a solid round ball (253); the mounting frame (220) is provided with a through bolt hole, a bolt (251) is mounted in the bolt hole, the bolt (251) compresses a spring (252), the upper end of the spring (252) is provided with a solid round ball (253), the outer side surface of the moving shaft (120) is axially provided with four uniformly distributed arc-shaped guide grooves (121), the radius of each arc-shaped groove is equal to that of the solid round ball (253), and the solid round ball (253) is clamped into the arc-shaped guide groove (121) so as to be matched with the compressing assembly (250).
5. The device for detecting the precision of the original station of the numerical control machine tool as claimed in claim 2, wherein: the upper half part of the outer side of the mounting frame (220) is chamfered, 8 uniformly distributed threaded holes are formed in the mounting frame, and bolts (251) of 8 groups of pressing assemblies (250) are installed in a matched mode with the threaded holes in the chamfer.
6. The device for detecting the precision of the original station of the numerical control machine tool as claimed in claim 2, characterized in that: an oil guide groove (122) is longitudinally formed in the outer side surface of the moving shaft (120), and the oil guide groove (122) is communicated with the arc-shaped guide groove (121); for lubricating the moving shaft (120).
7. The device for detecting the precision of the original station of the numerical control machine tool as claimed in claim 2, wherein: the ball nut (110) is sleeved on the ball screw (210) and matched with the ball screw (210) for converting the rotary motion of the ball screw (210) into the linear motion of the ball nut (110).
8. The device for detecting the precision of the original station of the numerical control machine tool as claimed in claim 2, wherein: the ball screw (210) is internally provided with a blind hole, the depth of the blind hole is slightly longer than the length of the detection end of the magnetostrictive displacement sensor (130), and the blind hole is matched with the detection end of the magnetostrictive displacement sensor (130) and used for feeding back displacement information when the moving shaft (120) moves.
9. The device for detecting the precision of the original station of the numerical control machine tool according to claim 1, characterized in that: the workpiece rotation angle detection device (3) is structurally characterized in that: install on workstation revolving table face (5) through bolt (37) and T type nut (31) steel grid chi base ring (32) of equipartition, steel grid chi (34) suit is on steel grid chi base ring (32), and second protection casing (33) are installed on steel grid chi base ring (32), and steel grid chi detects head (35) and installs on steel grid chi detects head base (36), and steel grid chi detects head (35) and keeps reasonable distance with steel grid chi (34).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222995257.8U CN218874759U (en) | 2022-11-10 | 2022-11-10 | Numerical control machine tool original station precision detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222995257.8U CN218874759U (en) | 2022-11-10 | 2022-11-10 | Numerical control machine tool original station precision detection device |
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| Publication Number | Publication Date |
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| CN218874759U true CN218874759U (en) | 2023-04-18 |
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| CN202222995257.8U Active CN218874759U (en) | 2022-11-10 | 2022-11-10 | Numerical control machine tool original station precision detection device |
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| CN (1) | CN218874759U (en) |
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Assignee: Tianjin Saixiang Technology Co.,Ltd. Assignor: TIANJIN University OF TECHNOLOGY AND EDUCATION (CHINA VOCATIONAL TRAINING INSTRUCTOR TRAINING CENTER) Contract record no.: X2024980002945 Denomination of utility model: A precision detection device for the original workstation of CNC machine tools Granted publication date: 20230418 License type: Common License Record date: 20240315 |
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