CN114714153A - Auxiliary fixture and detection method for detecting vertical C-axis positioning accuracy of eccentric structure - Google Patents

Auxiliary fixture and detection method for detecting vertical C-axis positioning accuracy of eccentric structure Download PDF

Info

Publication number
CN114714153A
CN114714153A CN202210426716.2A CN202210426716A CN114714153A CN 114714153 A CN114714153 A CN 114714153A CN 202210426716 A CN202210426716 A CN 202210426716A CN 114714153 A CN114714153 A CN 114714153A
Authority
CN
China
Prior art keywords
axis
machine tool
calibrator
shaft
instrument
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202210426716.2A
Other languages
Chinese (zh)
Other versions
CN114714153B (en
Inventor
谢靖超
李颖
谢睿
贾永锋
潘世禄
黄勇彪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chengdu Aircraft Industrial Group Co Ltd
Original Assignee
Chengdu Aircraft Industrial Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chengdu Aircraft Industrial Group Co Ltd filed Critical Chengdu Aircraft Industrial Group Co Ltd
Priority to CN202210426716.2A priority Critical patent/CN114714153B/en
Publication of CN114714153A publication Critical patent/CN114714153A/en
Application granted granted Critical
Publication of CN114714153B publication Critical patent/CN114714153B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
    • B23Q17/2452—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves for measuring features or for detecting a condition of machine parts, tools or workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
    • B23Q17/248—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves using special electromagnetic means or methods
    • B23Q17/2495—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves using special electromagnetic means or methods using interferometers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The invention relates to the field of machine tool precision detection, in particular to an auxiliary clamp and a detection method for detecting the vertical C-axis positioning precision of an eccentric structure, wherein the auxiliary clamp comprises a hydraulic tool handle and an instrument mounting seat; the instrument mounting base comprises a connecting disc and a clamping handle, the connecting disc and the hydraulic knife handle are coaxially arranged, one end of the clamping handle is fixedly connected with the top of the connecting disc, and the other end of the clamping handle is inserted into the hydraulic knife handle and is detachably and fixedly connected with the hydraulic knife handle through a locking screw; the connecting disc is provided with a plurality of instrument mounting holes. According to the technical scheme, the special auxiliary clamp is used for installing the revolving shaft calibrator on the main shaft, the axis of the revolving shaft calibrator is coincided with the rotating axis of the C shaft based on the RTCP five-axis linkage function of the machine tool, the fact that light is not interrupted in the measuring process is guaranteed, the revolving shaft calibrator is matched with the laser interferometer to be used, and the rapid detection of the positioning accuracy of any angle of the vertical C shaft with an eccentric structure is achieved.

Description

Auxiliary fixture and detection method for detecting vertical C-axis positioning accuracy of eccentric structure
Technical Field
The invention relates to the field of machine tool precision detection, in particular to an auxiliary clamp and a detection method for detecting the vertical C-axis positioning precision of an eccentric structure.
Background
With the rapid development of aerospace and automobile manufacturing industries in China, more parts are changed from simple profiles to complex profiles, and the conventional three-coordinate machine tool cannot meet the machining requirements, so that the multi-axis linkage numerical control machine tool is widely applied to machining of various complex parts. When being applied to complex parts machining, the multi-axis linkage machine tool can meet two requirements by ensuring the high-precision machining requirement: 1) in order to meet the machining precision requirements of complex parts, the machine tool must be ensured to have sufficient initial geometric precision. 2) In order to meet the requirement of high precision of part machining, the shafts of the machine tool must be ensured to have high positioning precision, but the positioning precision of the machine tool has great influence along with temperature, machining state, mechanical abrasion and the like, and the machine tool must be regularly subjected to error detection and compensation to ensure that the machining precision of the machine tool is maintained at a high level.
At present, a laser interferometer is adopted for detecting the positioning accuracy errors of linear axes, a swing angle detector can be adopted for detecting the axes A and B of swing angles, a rotary table can be used for detecting the axes A and B of swing angles, but for detecting the positioning accuracy of the vertical axis C of an eccentric structure, due to the unique structure type, the angle swing detector cannot be used for detecting the axes A and B of the swing angles, the rotary axis calibrator can be used for detecting the axes A and B of the swing angles only by requiring the instrument to be concentric with the center of the axis C of the swing axes C, but the center of the axis C of the swing axes is arranged in a Z-direction ram, and the installation of the swing calibrator is difficult to realize, so that the detection of the positioning accuracy of the vertical axis C of the eccentric structure becomes an important problem of the accuracy detection of the existing machine tool.
Disclosure of Invention
The invention aims to provide an auxiliary fixture and a detection method for detecting the positioning accuracy of a vertical C shaft with an eccentric structure, aiming at the defects in the prior art, and the auxiliary fixture and the detection method are used for realizing the coaxiality of a C shaft rotation axis and a main shaft axis by utilizing the RTCP five-axis linkage function of a machine tool, so that a rotary shaft calibrator and the center of the C shaft rotation axis are quickly positioned, and a foundation is laid for the detection of the positioning accuracy of the vertical C shaft with the eccentric structure, wherein the specific scheme is as follows:
an auxiliary clamp for detecting the vertical C-axis positioning accuracy of an eccentric structure comprises a hydraulic tool handle and an instrument mounting seat; the instrument mounting base comprises a connecting disc and a clamping handle, the connecting disc and the hydraulic tool handle are coaxially arranged, one end of the clamping handle is fixedly connected with the top of the connecting disc, and the other end of the clamping handle is inserted into the hydraulic tool handle and is detachably and fixedly connected with the hydraulic tool handle through a locking screw; and a plurality of instrument mounting holes are formed in the connecting disc.
Preferably, the bottom of the connecting disc is provided with an instrument positioning boss which is of a circular ring structure coaxially arranged with the connecting disc.
Preferably, there are four instrument mounting holes, and the four instrument mounting holes are arranged at equal intervals along the circumference of the instrument positioning boss.
A method for detecting the positioning accuracy of a vertical C axis of an eccentric structure comprises the following steps:
s1, editing a C-axis test program in a numerical control system of the machine tool based on the RTCP five-axis linkage function of the machine tool;
s2, adjusting the rotation coaxiality of the machine tool spindle and the C shaft under the RTCP five-axis linkage function of the machine tool, so that the coaxiality is within the accuracy error range of the machine tool structure;
s3, controlling the machine tool to move to the original position, and coaxially installing the auxiliary clamp on a main shaft of the machine tool;
s4, executing a main shaft locking instruction through a numerical control system of the machine tool, and then coaxially installing the rotary shaft calibrator at the bottom of the auxiliary clamp by utilizing the installation screws to be matched with the instrument installation holes;
s5, erecting a laser interferometer based on the space structure of the detection site, and adjusting laser beams through the laser interferometer to enable the laser to meet the five-grid green signal;
s6, connecting the rotary calibration instrument and the laser interferometer into the same computer, and arranging measurement software in the computer, wherein the measurement software comprises a point location measurement program for controlling the rotary calibration instrument to operate and receiving and recording the measurement result of the laser interferometer;
and S7, running a C-axis test program and starting measurement software to enable the C-axis and the rotation calibrator to run simultaneously, wherein: the C-axis operation is that under the RTCP five-axis linkage function of the machine tool, the position of the main shaft keeps locked, and the C-axis rotates around the axis of the main shaft by a rotation angle Q at intervals of T; the rotation of the rotation calibrator is that the reflector of the rotation calibrator rotates around the axis of the spindle by a rotation angle q at intervals of time t under the control of a point measurement program; q = -Q, T = T; wherein "-" represents a direction;
and S8, under the control of the point measurement program, detecting the error between the actual position and the theoretical position of the reflector by using the laser interferometer within each interval time t of the reflector of the rotary calibration instrument, and uploading the measurement result to measurement software for recording and storing.
Preferably, in step S2, the adjusting the rotation coaxiality of the machine tool spindle and the C-axis under the RTCP five-axis linkage function of the machine tool includes:
s21, installing a machine tool check rod in the inner cone of the main shaft, and erecting a dial indicator on one side of the machine tool check rod;
s22, finding the highest point of the machine tool check rod, and setting the pre-pressing amount of the dial indicator according to the requirement;
s23, operating a C-axis test program to enable the position of the spindle to be unchanged, and enabling the C-axis to rotate around the axis of the spindle under the RTCP five-axis linkage function of the machine tool;
s24, observing the reading change on the dial indicator in the process of rotating the C axis by 0-360 degrees, and recording the maximum reading Smax and the minimum reading Smin;
s25, calculating the rotation coaxiality delta S of the main shaft and the C shaft under the RTCP five-shaft linkage function of the machine tool, wherein the calculation formula is delta S = Smax-Smin;
s26, judging whether the delta S is less than or equal to 0.02 mm; if yes, disassembling the machine tool check rod, and entering step S2; if not, adjusting relevant parameters of the machine tool mechanical structure and/or the machine tool numerical control system, and then returning to the step S23.
Preferably, in step S22, the pre-compression amount of the dial indicator is 0.2 mm.
Preferably, in the process of mounting the rotation axis calibration instrument in step S4, before the rotation axis calibration instrument is fixed by the mounting screws, the rotation axis calibration instrument is positioned by engaging with the instrument positioning boss at the bottom of the auxiliary clamp to fix the rotation axis calibration instrument to the auxiliary clamp.
Preferably, in step S7, the angle Q is 1 ° to 10 °.
Preferably, in step S7, the time T is 4S to 5S.
The invention has the beneficial effects that:
1) the technical scheme provides the auxiliary clamp, the easy installation is realized based on the hydraulic tool handle, the coincidence of the self axis and the axis of the main shaft can be ensured, the rotating shaft calibrator is arranged on the main shaft through the auxiliary clamp, the rapid coincidence and positioning of the axis of the rotating shaft calibrator and the axis of the main shaft can be realized, a reliable foundation is laid for the detection of the positioning accuracy of the vertical C shaft with an eccentric structure, and the auxiliary clamp has an important application prospect; in addition, the hydraulic tool handles of the auxiliary fixture are detachably and fixedly connected with the instrument mounting seat through the locking screws, so that the connection stability is ensured, the support is detachable, different hydraulic tool handles can be conveniently replaced according to needs, the tool handle clamping requirements of different main shafts are met, and the applicability of the auxiliary fixture is improved.
2) The auxiliary clamp of the technical scheme is provided with the instrument positioning boss, so that the rotary axis calibrator can be quickly positioned when being installed, and the coaxial arrangement of the rotary axis calibrator and the auxiliary clamp is ensured; in addition, four instrument mounting holes are formed, so that the mounting stability of the rotary shaft calibrator is ensured.
3) According to the technical scheme, the revolving shaft calibrator is installed on the main shaft by using the special auxiliary clamp, on the premise, the axis of the revolving shaft calibrator is overlapped with the rotating axis of the C shaft based on the RTCP five-axis linkage function of the machine tool, the light interruption in the measuring process can be ensured, the revolving shaft calibrator is matched with the laser interferometer for use, the rapid detection of the positioning precision of any angle of the vertical C shaft with an eccentric structure is realized, the trouble of dismounting and protection is avoided, and the detection time and cost of the positioning precision of the C shaft are greatly shortened.
4) The technical scheme can be used for aiming at the characteristic of an eccentric structure with a main shaft and a C shaft being not concentric, based on the RTCP five-axis linkage function of the machine tool, the axis of the main shaft is adjusted to be coincident with the rotation center line of the C shaft, the coaxiality delta S of the axis of the main shaft and the rotation center line of the C shaft is detected by matching a check rod with a dial indicator, the machine tool is adjusted in a relevant mode according to the measurement result, the situation that the delta S is less than or equal to 0.02mm in the range of 360-degree rotation of the C shaft is ensured, and the accuracy of the vertical C shaft positioning accuracy of the eccentric structure is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of an auxiliary clamp;
FIG. 2 is a schematic view of a mounting structure of a check rod of the machine tool;
FIG. 3 is a schematic view of an auxiliary clamp based gyroscopic calibrator mounting arrangement;
FIG. 4 is a schematic diagram of the layout principle of each instrument in the detection process.
1. An auxiliary clamp; 1.1, a hydraulic knife handle; 1.2, an instrument mounting base; 1.21, connecting the disks; 1.22, a clamping handle; 1.23, instrument mounting holes; 1.24, positioning a boss of the instrument; 1.3, locking a screw; 2. a C axis; 3. a main shaft; 4. an inner cone; 5. a machine tool check rod; 6. a dial indicator; 7. a gyroscopic calibrator; 7.1, a reflector; 8. a laser interferometer; 8.1, a laser head; 8.2, an angle interference mirror; 9. the axis of the C shaft; 10. the axis of the main shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.
Thus, the following detailed description of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
Because of the characteristic of an eccentric structure, when the C shaft 2 is rotated, the axis of the main shaft 3 can deviate, the light can be cut off in the measuring process, and the positioning accuracy of the C shaft 2 can be measured only by ensuring that a rotating shaft calibrator coincides with the center line of the C shaft 2, so that the light can be cut off in the measuring process, based on the fact, the embodiment discloses an auxiliary clamp and a detection method for detecting the positioning accuracy of the vertical C shaft with the eccentric structure, and as a preferred embodiment of the invention, the auxiliary clamp 1 comprises a hydraulic tool handle 1.1 (a tool sleeve) and an instrument mounting seat 1.2; the instrument mounting base 1.2 comprises a connecting disc 1.21 and a clamping handle 1.22, the connecting disc 1.21 and the hydraulic tool handle 1.1 are coaxially arranged, one end of the clamping handle 1.22 is fixedly connected with the top of the connecting disc 1.21, the other end of the clamping handle 1.22 is inserted into the hydraulic tool handle 1.1 and is detachably and fixedly connected with the hydraulic tool handle 1.1 through a locking screw 1.3; the connecting disc 1.21 is provided with a plurality of instrument mounting holes 1.23, and the instrument mounting holes 1.23 are countersunk screw holes.
The technical scheme provides an auxiliary clamp 1, which is easy to install based on a hydraulic tool handle 1.1, can ensure that the axis of the auxiliary clamp is superposed with the axis 10 of a main shaft, and can realize quick superposition positioning of the axis of a rotating shaft calibrator and the axis of the main shaft 3 by installing the rotating shaft calibrator on the main shaft 3 through the auxiliary clamp 1, thereby laying a reliable foundation for the positioning precision detection of a vertical C shaft 2 with an eccentric structure and having important application prospect; in addition, the hydraulic tool holder 1.1 of the auxiliary clamp 1 and the instrument mounting base 1.2 are fixedly connected in a detachable mode through the locking screw 1.3, connection stability is guaranteed, meanwhile, the support is detachable, different hydraulic tool holders 1.1 can be replaced conveniently as required, the tool holder clamping requirements of different main shafts 3 are met, and the applicability of the auxiliary clamp 1 is improved.
Based on the structure of the auxiliary clamp 1, the method for detecting the positioning accuracy of the vertical C-axis 2 of the eccentric structure comprises the following steps:
s1, editing a C-axis 2 test program in a numerical control system of the machine tool based on the RTCP five-axis linkage function of the machine tool (taking Siemens as an example, the five-axis linkage function can be activated by executing a TRAORI instruction);
s2, adjusting the rotation coaxiality of the machine tool spindle 3 and the C shaft 2 under the RTCP five-axis linkage function of the machine tool, so that the coaxiality is within the error range of the machine tool structure precision, and the influence of the coaxiality on the final detection result is reduced to the maximum extent to ensure the reliability of the final detection result;
and S3, controlling the machine tool to run to the original position, ensuring that the C shaft 2 and the main shaft 3 return to the original positions, and then coaxially installing the auxiliary clamp 1 on the main shaft 3 of the machine tool, specifically: the hydraulic tool holder 1.1 is arranged on the main shaft 3, so that the central axis of the hydraulic tool holder 1.1 can be ensured to be coincided with the central axis of the main shaft 3, and further, the central axis of the whole auxiliary clamp 1 is coincided with the central axis of the main shaft 3;
s4, executing a main shaft 3 locking instruction through a numerical control system of the machine tool, and then coaxially installing the rotary shaft calibrator at the bottom of the auxiliary clamp 1 by utilizing the installation screw to be matched with the instrument installation hole 1.23, wherein at the moment, the central shaft of the main shaft 3, the central shaft of the auxiliary clamp 1 and the central shaft of the rotary calibrator 7;
s5, as shown in FIG. 4, erecting the laser interferometer 8 based on the space structure of the detection site, and making the laser head 8.1 of the laser interferometer 8, the angle interferometer 8.2 and the reflector 7.1 of the rotation axis calibrator to be on the same horizontal line; then, laser beams are adjusted through a laser interferometer 8, so that the laser meets the five-grid green signal;
s6, connecting the rotary calibration instrument 7 and the laser interferometer 8 into the same computer, and arranging measurement software in the computer, wherein the measurement software comprises a point location measurement program for controlling the rotary calibration instrument 7 to operate and receiving and recording the measurement result of the laser interferometer 8;
and S7, running a C-axis 2 test program and starting measurement software to enable the C-axis 2 and the rotary calibration instrument 7 to run simultaneously, wherein:
the C shaft 2 operates under the RTCP five-shaft linkage function of the machine tool, the position of the main shaft 3 is kept locked (the deflection of a rotating shaft calibrator in the process of rotating the C shaft 2 is avoided, and the measurement error is caused), and the C shaft 2 rotates by a angle Q around the axis of the main shaft by 10 degrees at intervals T;
the rotation calibrator 7 operates by rotating the reflector 7.1 of the rotation calibrator 7 by an angle q around the spindle axis 10 at intervals t under the control of a point measurement program; q = -Q, T = T; wherein "-" represents a direction, that is, Q = -Q represents that the rotation directions of the mirror 7.1 of the rotary calibration instrument 7 and the C axis 2 are opposite, and the rotation angles are equal;
s8, under the control of the point measurement program, detecting the error between the actual position and the theoretical position of the reflector 7.1 by using the laser interferometer 8 in each interval time t of the reflector 7.1 of the rotation calibrator 7, wherein the error is the positioning accuracy of the vertical C axis 2 of the eccentric structure; and uploading the measurement result to measurement software for recording and storing, so that the C-axis 2 positioning precision full-angle detection of the eccentric structure is realized.
According to the technical scheme, the special auxiliary clamp 1 is used for installing the revolving shaft calibrator on the main shaft 3, on the premise, based on the five-axis linkage function of the machine tool RTCP, the axis of the revolving shaft calibrator is overlapped with the rotating axis of the C shaft 2, the light interruption in the measuring process can be ensured, the revolving shaft calibrator is matched with the laser interferometer 8 for use, the rapid detection of the positioning precision of any angle of the vertical C shaft 2 with an eccentric structure is realized, the trouble of dismounting and protection is avoided, and the detection time and cost of the positioning precision of the C shaft 2 are greatly shortened.
Example 2
The embodiment discloses an auxiliary clamp and a detection method for detecting the vertical C-axis positioning accuracy of an eccentric structure, and as a preferred embodiment of the invention, the auxiliary clamp 1 comprises a hydraulic tool handle 1.1 (a tool sleeve) and an instrument mounting seat 1.2; the instrument mounting base 1.2 comprises a connecting disc 1.21 and a clamping handle 1.22, the connecting disc 1.21 and the hydraulic tool handle 1.1 are coaxially arranged, one end of the clamping handle 1.22 is fixedly connected with the top of the connecting disc 1.21, the other end of the clamping handle 1.22 is inserted into the hydraulic tool handle 1.1 and is detachably and fixedly connected with the hydraulic tool handle 1.1 through a locking screw 1.3; the connecting disc 1.21 is provided with a plurality of instrument mounting holes 1.23, and the instrument mounting holes 1.23 are countersunk screw holes.
Based on the structure of the auxiliary clamp 1, the method for detecting the positioning accuracy of the vertical C-axis 2 of the eccentric structure comprises the following steps:
s1, editing a C-axis 2 test program in a numerical control system of the machine tool based on the RTCP five-axis linkage function of the machine tool;
s2, adjusting the rotation coaxiality of the machine tool spindle 3 and the C shaft 2 under the RTCP five-axis linkage function of the machine tool to ensure that the coaxiality is within the error range of the structure precision of the machine tool, and specifically comprising the following steps:
s21, installing a machine tool inspection rod 5 in the inner cone 4 of the main shaft 3, and erecting a dial indicator 6 on one side of the machine tool inspection rod 5;
s22, finding the highest point of the machine tool check rod 5, and setting the pre-pressing amount of the dial indicator 6 according to the requirement, wherein the pre-pressing amount is pre-estimated manually according to the factory allowed operation error of the machine tool, and can be set to be 0.2mm specifically;
s23, running a C-axis 2 test program to enable the position of the spindle 3 to be unchanged, and enabling the C-axis 2 to rotate around the spindle axis 10 under the RTCP five-axis linkage function of the machine tool;
s24, observing the change of the reading on the dial indicator 6 in the process of rotating the C shaft 2 by 0-360 degrees, and recording the maximum reading Smax and the minimum reading Smin;
s25, calculating the rotation coaxiality delta S of the main shaft 3 and the C shaft 2 under the RTCP five-axis linkage function of the machine tool, wherein the calculation formula is delta S = Smax-Smin;
s26, judging whether the Delta S is less than or equal to 0.02mm (generally, when the machine tool leaves the factory, the Delta S is less than or equal to 0.02mm, after the machine tool is used for a long time, the Delta S may exceed 0.02mm for various reasons, although the possibility is small, the step S2 is necessary for ensuring the final measurement accuracy); if yes, the machine tool check rod 5 is disassembled, and the step S2 is carried out; if not, adjusting relevant parameters of the machine tool mechanical structure and/or the machine tool numerical control system (namely, checking the machine tool mechanical structure and the machine tool numerical control program according to actual conditions, and reducing Δ S in a mode of performing targeted maintenance or modifying relevant parameters (such as corresponding compensation parameters and the like) on the machine tool), and then returning to step S23;
s3, controlling the machine tool to move to the original position, and coaxially installing the auxiliary clamp 1 on the main shaft 3 of the machine tool;
s4, executing a main shaft 3 locking instruction through a numerical control system of the machine tool, and then coaxially installing the rotary shaft calibrator at the bottom of the auxiliary clamp 1 by utilizing the installation screw to be matched with the instrument installation hole 1.23;
s5, erecting a laser interferometer 8 based on the space structure of the detection site, and adjusting laser beams through the laser interferometer 8 to enable the laser to meet the five-grid green signal;
s6, connecting the rotary calibration instrument 7 and the laser interferometer 8 into the same computer, and setting measurement software in the computer, wherein the measurement software comprises a point location measurement program for controlling the rotary calibration instrument 7 to operate and receiving and recording the measurement result of the laser interferometer 8;
and S7, running a C-axis 2 test program and starting measurement software to enable the C-axis 2 and the rotary calibration instrument 7 to run simultaneously, wherein:
the C shaft 2 operates under the RTCP five-shaft linkage function of the machine tool, the position of the main shaft 3 is kept locked, and the C shaft 2 rotates around the axis of the main shaft by a rotation angle Q of 10 at intervals T;
the rotation of the rotation calibrator 7 is that the reflector 7.1 of the rotation calibrator 7 rotates around the axis 10 of the main shaft by an angle q at intervals t under the control of a point measurement program; q = -Q, T = T; wherein "-" represents a direction;
and S8, under the control of the point measurement program, detecting the error between the actual position and the theoretical position of the reflector 7.1 by using the laser interferometer 8 in each interval time t of the reflector 7.1 of the rotary calibrator 7, and uploading the measurement result to measurement software for recording and storing.
The technical scheme can be used for aiming at the characteristic of an eccentric structure that the main shaft 3 and the C shaft 2 are not concentric, based on the RTCP five-axis linkage function of the machine tool, the axis of the main shaft 3 is adjusted to be coincident with the rotation center line of the C shaft 2, the coaxiality delta S of the axis of the main shaft 3 and the rotation center line of the C shaft 2 is detected by matching the check rod with the dial indicator 6, the machine tool is adjusted in a relevant mode according to the measurement result, the situation that the delta S is less than or equal to 0.02mm in the rotation range of 2360 degrees of the C shaft is ensured, and the accuracy of the positioning accuracy of the vertical C shaft 2 of the eccentric structure is ensured.
The technical scheme
Example 3
The embodiment discloses an auxiliary clamp and a detection method for detecting the vertical C-axis positioning accuracy of an eccentric structure, and as a preferred embodiment of the invention, the auxiliary clamp 1 comprises a hydraulic tool handle 1.1 (a tool sleeve) and an instrument mounting seat 1.2; the instrument mounting base 1.2 comprises a connecting disc 1.21 and a clamping handle 1.22, the connecting disc 1.21 and the hydraulic tool handle 1.1 are coaxially arranged, one end of the clamping handle 1.22 is fixedly connected with the top of the connecting disc 1.21, the other end of the clamping handle 1.22 is inserted into the hydraulic tool handle 1.1 and is detachably and fixedly connected with the hydraulic tool handle 1.1 through a locking screw 1.3; the connecting disc 1.21 is provided with a plurality of instrument mounting holes 1.23, and the instrument mounting holes 1.23 are countersunk screw holes.
Further, an instrument positioning boss 1.24 is arranged at the bottom of the connecting disc 1.21, and the instrument positioning boss 1.24 is in a ring structure coaxially arranged with the connecting disc 1.21; there are four instrument mounting holes 1.23, and four instrument mounting holes 1.23 are arranged at equal intervals along the circumference of instrument positioning boss 1.24.
The auxiliary clamp 1 of the technical scheme is provided with the instrument positioning boss 1.24, so that the quick positioning of the rotating shaft calibrator during installation can be realized, and the rotating shaft calibrator is ensured to be coaxial with the auxiliary clamp 1; in addition, four instrument mounting holes 1.23 are arranged, so that the stability of the installation of the rotary shaft calibrator is ensured.
Based on the structure of the auxiliary clamp 1, the method for detecting the positioning accuracy of the vertical C-axis 2 of the eccentric structure comprises the following steps:
and S1, editing a C-axis 2 test program in the numerical control system of the machine tool based on the RTCP five-axis linkage function of the machine tool.
And S2, adjusting the rotation coaxiality of the machine tool spindle 3 and the C shaft 2 under the RTCP five-axis linkage function of the machine tool, so that the coaxiality is within the error range of the structure precision of the machine tool.
And S3, controlling the machine tool to move to the original position, and coaxially mounting the auxiliary clamp 1 on the main shaft 3 of the machine tool.
S4, executing a main shaft 3 locking instruction through a numerical control system of the machine tool, and then coaxially installing the rotary shaft calibrator at the bottom of the auxiliary clamp 1 by utilizing the installation screw to be matched with the instrument installation hole 1.23; specifically, the rotating axis calibrator is firstly positioned by matching the instrument positioning boss 1.24 at the bottom of the auxiliary clamp 1 with the rotating axis calibrator fixing ring so as to ensure that the rotating axis calibrator is coaxial with the auxiliary clamp 1, and then the rotating axis calibrator is fixed by inserting mounting screws into the instrument mounting holes 1.23.
S5, erecting a laser interferometer 8 based on the space structure of the detection site, and adjusting the laser beam through the laser interferometer 8 to enable the laser to meet the five-grid green signal.
And S6, connecting the rotary calibration instrument 7 and the laser interferometer 8 into the same computer, and arranging measurement software in the computer, wherein the measurement software comprises a point location measurement program for controlling the operation of the rotary calibration instrument 7 and receiving and recording the measurement result of the laser interferometer 8.
And S7, running a C-axis 2 test program and starting measurement software to enable the C-axis 2 and the rotary calibration instrument 7 to run simultaneously, wherein: the C shaft 2 operates under the RTCP five-axis linkage function of the machine tool, the position of the main shaft 3 is kept locked, and the C shaft 2 rotates around the axis 10 of the main shaft by a rotation angle Q at intervals T. In order to ensure that the detection of the positioning accuracy of the C-axis 2 of the eccentric structure is close to full-angle detection as much as possible, the value of the angle Q is 1-10 degrees, and in order to improve the detection efficiency, the value of the angle Q is preferably 5 degrees in compromise. The rotation calibrator 7 operates by rotating the reflector 7.1 of the rotation calibrator 7 by an angle q around the spindle axis 10 at intervals t under the control of a point measurement program; q = -Q, T = T; wherein "-" indicates a direction. The detection efficiency is influenced by too long time T, the data acquisition effect is influenced by too short time T, the value of the time T is 4 s-5 s according to the analysis of the experimental result, namely the value of the time T is 4 s-5 s, and preferably, the values of the time T and the time T are 4 s.
And S8, under the control of the point measurement program, detecting the error between the actual position and the theoretical position of the reflector 7.1 by using the laser interferometer 8 in each interval time t of the reflector 7.1 of the rotary calibrator 7, and uploading the measurement result to measurement software for recording and storing.
Based on the values of the parameters in step S7, in combination with step S7 and step S8, the process of detecting the positioning accuracy of the eccentric structure perpendicular to the C-axis 2 is as follows:
the laser interferometer 8 takes the C axis 2 to rotate 5 degrees every time as a measuring point, specifically, the C axis of the machine tool is forward stepped by 5 degrees, meanwhile, a reflecting mirror 7.1 on the rotating axis standard instrument reversely rotates by 5 degrees to ensure that the measuring process is not interrupted, and then the C axis of the machine tool and the rotating axis standard instrument stay for 4 seconds at the same time, so that the laser interferometer 8 can conveniently acquire data. During the period, 5 degrees of the rotation of the reflecting mirror 7.1 is absolute 5 degrees, laser emitted by the laser interferometer 8 is reflected by the reflecting mirror 7.1 of the rotation axis standard instrument, then passes through the angle interference mirror 8.2 of the laser interferometer 8 and enters the incident light port of the laser head 8.1 of the laser interferometer 8, the laser head 8.1 measures the angle difference between the actual position and the theoretical position of the reflecting mirror 7.1 on the rotation axis standard instrument based on the angle interference principle, and the measurement result is uploaded to the measurement software. And the C-axis of the machine tool and the reflecting mirror 7.1 on the rotating shaft standard instrument continue to rotate according to the requirements, the laser interferometer 8 is matched for measurement, and the measurement software records and stores all measurement results, so that the full-angle detection of the positioning accuracy of the vertical C-axis 2 with the eccentric structure is realized.

Claims (9)

1. The utility model provides a perpendicular C axle positioning accuracy of eccentric structure detects supplementary anchor clamps which characterized in that: comprises a hydraulic knife handle (1.1) and an instrument mounting seat (1.2); the instrument mounting base (1.2) comprises a connecting disc (1.21) and a clamping handle (1.22), the connecting disc (1.21) and a hydraulic cutter handle (1.1) are coaxially arranged, one end of the clamping handle (1.22) is fixedly connected with the top of the connecting disc (1.21), the other end of the clamping handle (1.22) is inserted into the hydraulic cutter handle (1.1), and the clamping handle (1.22) is detachably and fixedly connected with the hydraulic cutter handle (1.1) through a locking screw (1.3); the connecting disc (1.21) is provided with a plurality of instrument mounting holes (1.23).
2. The auxiliary fixture for detecting the vertical C-axis positioning accuracy of an eccentric structure as claimed in claim 1, wherein: the bottom of connecting disc (1.21) is provided with instrument location boss (1.24), and instrument location boss (1.24) is the ring structure with connecting disc (1.21) coaxial setting.
3. The auxiliary fixture for detecting the vertical C-axis positioning accuracy of an eccentric structure as claimed in claim 1, wherein: the number of the instrument mounting holes (1.23) is four, and the four instrument mounting holes (1.23) are arranged at equal intervals along the circumferential direction of the instrument positioning boss (1.24).
4. A method for detecting the positioning accuracy of a vertical C axis of an eccentric structure is characterized by comprising the following steps:
s1, editing a C-axis (2) test program in a numerical control system of the machine tool based on the RTCP five-axis linkage function of the machine tool;
s2, adjusting the rotation coaxiality of the machine tool spindle (3) and the C shaft (2) under the RTCP five-axis linkage function of the machine tool, so that the coaxiality is within the error range of the structure precision of the machine tool;
s3, controlling the machine tool to move to the original position, and coaxially installing the auxiliary clamp (1) according to any one of claims 1-3 on the main shaft (3) of the machine tool;
s4, executing a main shaft (3) locking instruction through a numerical control system of the machine tool, and then coaxially installing the rotating shaft calibrator at the bottom of the auxiliary clamp (1) by utilizing the installation screw to be matched with the instrument installation hole (1.23);
s5, erecting a laser interferometer (8) based on the space structure of the detection site, and adjusting laser beams through the laser interferometer (8) to enable the laser to meet the five-grid green signal;
s6, connecting the rotary calibration instrument (7) and the laser interferometer (8) into the same computer, and setting measurement software in the computer, wherein the measurement software comprises a point location measurement program for controlling the rotary calibration instrument (7) to operate and receiving and recording the measurement result of the laser interferometer (8);
s7, running a C-axis (2) test program and starting measurement software to enable the C-axis (2) and the rotary calibrator (7) to run simultaneously, wherein:
the C shaft (2) operates under the RTCP five-axis linkage function of the machine tool, the position of the main shaft (3) is kept locked, and the C shaft (2) rotates around the axis (10) of the main shaft by a rotation angle Q at intervals T;
the rotation calibrator (7) operates by rotating the reflector (7.1) of the rotation calibrator (7) by a rotation angle q around the spindle axis (10) at intervals of time t under the control of a point measurement program; q = -Q, T = T; wherein "-" represents a direction;
and S8, under the control of the point measurement program, detecting the error between the actual position and the theoretical position of the reflector (7.1) by using the laser interferometer (8) in each interval time t of the reflector (7.1) of the rotary calibrator (7), and uploading the measurement result to measurement software for recording and storing.
5. The method for detecting the vertical C-axis positioning accuracy of an eccentric structure according to claim 4, wherein in step S2, the step of adjusting the rotation coaxiality of the machine tool spindle (3) and the C-axis (2) under the RTCP five-axis linkage function of the machine tool comprises the steps of:
s21, installing a machine tool check rod (5) in the inner cone (4) of the main shaft (3), and erecting a dial indicator (6) on one side of the machine tool check rod (5);
s22, finding the highest point of the machine tool check rod (5), and setting the pre-pressing amount of the dial indicator (6) according to the requirement;
s23, running a C-axis (2) test program to enable the position of the spindle (3) to be unchanged, and enabling the C-axis (2) to rotate around the spindle axis (10) under the RTCP five-axis linkage function of the machine tool;
s24, observing the reading change on the dial indicator (6) in the process of rotating the C axis (2) by 0-360 degrees, and recording the maximum reading Smax and the minimum reading Smin;
s25, calculating the rotation coaxiality delta S of the main shaft (3) and the C shaft (2) under the RTCP five-axis linkage function of the machine tool, wherein the calculation formula is delta S = Smax-Smin;
s26, judging whether the delta S is less than or equal to 0.02 mm; if yes, the machine tool check rod (5) is disassembled, and the step S2 is carried out; if not, adjusting relevant parameters of the machine tool mechanical structure and/or the machine tool numerical control system, and then returning to the step S23.
6. The method for detecting the positioning accuracy of the vertical C axis of the eccentric structure as recited in claim 5, wherein: in the step S22, the prepressing amount of the dial indicator (6) is 0.2 mm.
7. The method for detecting the positioning accuracy of the vertical C axis of the eccentric structure as claimed in claim 4, wherein: in the installation process of the revolution axis calibrator in the step S4, before the revolution axis calibrator is fixed by the installation screws, the revolution axis calibrator is positioned by matching the instrument positioning boss (1.24) at the bottom of the auxiliary clamp (1) with the revolution axis calibrator fixing ring, so as to ensure that the revolution axis calibrator and the auxiliary clamp (1) are coaxial.
8. The method for detecting the positioning accuracy of the vertical C axis of the eccentric structure as claimed in claim 4, wherein: in the step S7, the value of the angle Q is 1 ° to 10 °.
9. The method for detecting the positioning accuracy of the vertical C axis of the eccentric structure as claimed in claim 4, wherein: in step S7, the time T takes a value of 4S to 5S.
CN202210426716.2A 2022-04-22 2022-04-22 Auxiliary clamp and method for detecting vertical C-axis positioning accuracy of eccentric structure Active CN114714153B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210426716.2A CN114714153B (en) 2022-04-22 2022-04-22 Auxiliary clamp and method for detecting vertical C-axis positioning accuracy of eccentric structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210426716.2A CN114714153B (en) 2022-04-22 2022-04-22 Auxiliary clamp and method for detecting vertical C-axis positioning accuracy of eccentric structure

Publications (2)

Publication Number Publication Date
CN114714153A true CN114714153A (en) 2022-07-08
CN114714153B CN114714153B (en) 2023-06-09

Family

ID=82245104

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210426716.2A Active CN114714153B (en) 2022-04-22 2022-04-22 Auxiliary clamp and method for detecting vertical C-axis positioning accuracy of eccentric structure

Country Status (1)

Country Link
CN (1) CN114714153B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115256051A (en) * 2022-07-29 2022-11-01 南昌沪航工业有限公司 Auxiliary device and method for detecting position accuracy of rotating shaft of machine tool by laser
CN115431104A (en) * 2022-08-23 2022-12-06 成都飞机工业（集团）有限责任公司 Auxiliary fixture and detection method for detecting swing angle positioning accuracy of AB double-swing-angle milling head
CN115647932A (en) * 2022-11-02 2023-01-31 湖北工业大学 Method for controlling mounting precision of detachable milling head
CN115682867A (en) * 2022-10-21 2023-02-03 上海诺倬力机电科技有限公司 Five-axis head detection mechanism and detection method
CN117124137A (en) * 2023-10-23 2023-11-28 成都飞机工业（集团）有限责任公司 Measuring device and measuring method for zero point positioning of machine tool rotating shaft

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1063052A2 (en) * 1999-06-25 2000-12-27 Toyoda Koki Kabushiki Kaisha Apparatus for measuring dimensional errors of eccentric cylinder by utilizing movement of measuring member held in contact with such eccentric cylinder
CN103273379A (en) * 2013-05-29 2013-09-04 成都飞机工业（集团）有限责任公司 Method for detecting linkage accuracy of C-shaft of multi-shaft linkage double-pendulum numerical control milling machine
CN103365246A (en) * 2012-04-05 2013-10-23 菲迪亚股份公司 Device for error correction for CNC machines
TWM508389U (en) * 2015-03-27 2015-09-11 Univ Nat Formosa Image three-dimensional spatial error detection system
CN109458894A (en) * 2018-12-04 2019-03-12 厦门鼎运智能股份有限公司 Five axis turn round data spherical displacer and its application method
KR20200000689A (en) * 2018-06-25 2020-01-03 주식회사 윈텍오토메이션 Apparatus and method for aligning the tip of an object using mirrors and vision system
CN213136052U (en) * 2020-08-25 2021-05-07 中国第一汽车股份有限公司 Digit control machine tool precision testing auxiliary device
CN112975524A (en) * 2021-02-09 2021-06-18 中国航空制造技术研究院 Three-rotation-axis swing head suitable for ultrasonic cutting of composite material
CN114248154A (en) * 2021-11-05 2022-03-29 上海交通大学 Five-axis machine tool space positioning precision detection device and method

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1063052A2 (en) * 1999-06-25 2000-12-27 Toyoda Koki Kabushiki Kaisha Apparatus for measuring dimensional errors of eccentric cylinder by utilizing movement of measuring member held in contact with such eccentric cylinder
CN103365246A (en) * 2012-04-05 2013-10-23 菲迪亚股份公司 Device for error correction for CNC machines
CN103273379A (en) * 2013-05-29 2013-09-04 成都飞机工业（集团）有限责任公司 Method for detecting linkage accuracy of C-shaft of multi-shaft linkage double-pendulum numerical control milling machine
TWM508389U (en) * 2015-03-27 2015-09-11 Univ Nat Formosa Image three-dimensional spatial error detection system
KR20200000689A (en) * 2018-06-25 2020-01-03 주식회사 윈텍오토메이션 Apparatus and method for aligning the tip of an object using mirrors and vision system
CN109458894A (en) * 2018-12-04 2019-03-12 厦门鼎运智能股份有限公司 Five axis turn round data spherical displacer and its application method
CN213136052U (en) * 2020-08-25 2021-05-07 中国第一汽车股份有限公司 Digit control machine tool precision testing auxiliary device
CN112975524A (en) * 2021-02-09 2021-06-18 中国航空制造技术研究院 Three-rotation-axis swing head suitable for ultrasonic cutting of composite material
CN114248154A (en) * 2021-11-05 2022-03-29 上海交通大学 Five-axis machine tool space positioning precision detection device and method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115256051A (en) * 2022-07-29 2022-11-01 南昌沪航工业有限公司 Auxiliary device and method for detecting position accuracy of rotating shaft of machine tool by laser
CN115431104A (en) * 2022-08-23 2022-12-06 成都飞机工业（集团）有限责任公司 Auxiliary fixture and detection method for detecting swing angle positioning accuracy of AB double-swing-angle milling head
CN115682867A (en) * 2022-10-21 2023-02-03 上海诺倬力机电科技有限公司 Five-axis head detection mechanism and detection method
CN115647932A (en) * 2022-11-02 2023-01-31 湖北工业大学 Method for controlling mounting precision of detachable milling head
CN115647932B (en) * 2022-11-02 2023-07-18 湖北工业大学 Detachable milling head installation precision control method
CN117124137A (en) * 2023-10-23 2023-11-28 成都飞机工业（集团）有限责任公司 Measuring device and measuring method for zero point positioning of machine tool rotating shaft
CN117124137B (en) * 2023-10-23 2024-03-15 成都飞机工业（集团）有限责任公司 Measuring device and measuring method for zero point positioning of machine tool rotating shaft

Also Published As

Publication number Publication date
CN114714153B (en) 2023-06-09

Similar Documents

Publication Publication Date Title
CN114714153B (en) Auxiliary clamp and method for detecting vertical C-axis positioning accuracy of eccentric structure
US7278222B2 (en) Method for measuring a program-controlled machine tool
US7384220B2 (en) Laser-guided coordination hole drilling
EP1301754B1 (en) Method and device for calibrating rotary axis
KR102462329B1 (en) Method and apparatus for checking the position deviation of the rotating body
CN105588718A (en) Machine tool spindle comprehensive property detection/monitoring test system and method
CN102554701B (en) Method and device for compensating indexing error of machine tool
CN105651240A (en) Extensometer calibration device
JP3192992B2 (en) Method and system for measuring angle indexing accuracy of machine tool
CN108177024B (en) Tool rest positioning precision and repeated positioning precision detection device and use method
CN114749995B (en) Swing type rotary shaft positioning precision detection method
CN112097613A (en) Method for detecting rotation eccentricity of rotating shaft
CN112276571B (en) Inclined hole machining method
CN113074628B (en) Device and method for checking trimming molded surface
CN110977613A (en) Five-axis numerical control machine tool geometric error identification method based on test piece self-calibration
US20190070708A1 (en) Grinding machine calibration
CN112917191B (en) Device for assisting in positioning of B-axis rotation center of swing angle milling head
CN105841637A (en) Machine tool transmission chain detection device and detection method
CN113245904B (en) Coaxiality adjusting tool and method for automatic quick-change fixture tail end tool
CN215616708U (en) Universal joint machine tool benchmark positioner
CN210426371U (en) On-machine measuring device suitable for energy-containing rotary part
CN115431104A (en) Auxiliary fixture and detection method for detecting swing angle positioning accuracy of AB double-swing-angle milling head
CN103433808B (en) Dial gage base scale display edge finder
CN220592500U (en) Precision inspection device convenient to adjust
CN113532278A (en) Steel pipe diameter and circumference measuring device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant