CN114296402B - Machine tool torque zeroing method - Google Patents
Machine tool torque zeroing method Download PDFInfo
- Publication number
- CN114296402B CN114296402B CN202111661026.7A CN202111661026A CN114296402B CN 114296402 B CN114296402 B CN 114296402B CN 202111661026 A CN202111661026 A CN 202111661026A CN 114296402 B CN114296402 B CN 114296402B
- Authority
- CN
- China
- Prior art keywords
- zero
- machine tool
- value
- screw nut
- torque
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000003139 buffering effect Effects 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 230000000630 rising effect Effects 0.000 claims abstract description 12
- 239000011295 pitch Substances 0.000 description 28
- 238000003754 machining Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Numerical Control (AREA)
Abstract
The invention discloses a machine tool torque zeroing method, which comprises the following steps: setting a zero resetting preset value on the servo system; a buffer limit position is arranged on the screw rod mechanism, and the servo system drives a screw rod nut of the screw rod mechanism to move towards the buffer limit position at a first speed; the screw nut moves to the buffering limit position, and the servo system monitors the rising edge of the servo motor in real time to feed back the torque value until the torque value is equal to a zero-return preset value, the zero-return point of the machine tool is confirmed through the zero-point position signal provided by the encoder, and the technical problems that the setting efficiency is low and the accuracy is low through manual setting of mechanical zero points in the related technology are at least solved.
Description
Technical Field
The invention relates to the technical field of numerical control machine tools, in particular to a machine tool torque zeroing method.
Background
The mechanical origin is a reference point of all coordinate systems of the numerical control machine, the stability of the mechanical origin is an extremely important technical index of the numerical control machine, the stable machining precision and the basic guarantee of the operation of the numerical control machine are also realized, meanwhile, the service life of the numerical control machine is prolonged, and the operation convenience of the numerical control machine is improved. And the precision of proofing will be influenced by inaccurate zero point positioning of the machine tool or inaccurate zero point setting of the machine tool. In the prior art, the machine tool zero point is mainly found manually, the screw nut is easy to strike the screw rod fixed end when the machine tool zero point is found manually, the screw rod nut and the guide rail screw rod are damaged, the precision of the machine tool is further reduced, and finally the problem of inaccurate positioning of the machine tool zero point is also caused.
Disclosure of Invention
In order to overcome at least one defect in the prior art, the invention provides a machine tool torque zeroing method, which at least solves the technical problems of low setting efficiency and low accuracy in the related art by manually setting a mechanical zero point.
The invention adopts the technical proposal for solving the problems that:
a machine tool torque zero-returning method, the torque value of the servo system is directly compared with the zero-returning preset value to confirm the mechanical zero-returning point, comprises the following steps:
step S1: setting the zeroing preset value on the servo system, wherein in the step, the servo system synchronously sets other related parameters such as rotating speed, coordinate coefficient and the like, and the servo motor sets corresponding encoders so as to ensure the normal operation of the servo system and prepare for the follow-up zeroing operation;
step S2: a buffer limit position is arranged on a screw rod mechanism, a servo system drives a screw rod nut of the screw rod mechanism to move towards the buffer limit position at a first speed, and a fixed buffer block is arranged at the end part of a screw rod guide rail receiver to receive optional silica gel blocks, wherein the screw rod guide rail receiver can be driven to rotate by a servo motor, the servo system in the above steps is started after preparation, and the servo system sends a control instruction to enable the servo motor to receive and rotate so that the screw rod nut receiver moves towards the buffer block receiver at the first speed, and the screw rod nut receiver can slide in an idle mode and can move at a high speed;
step S3: the screw nut moves to the buffering limit position, the servo system monitors the rising edge of the servo motor in real time to feed back the torque value until the torque value is equal to the zero-return preset value, a zero point of the machine tool is confirmed through a zero position signal provided by the encoder, specifically, after the screw nut receives the impact buffer block, the servo system receives the torque which is provided by the torque and acts on the screw nut through monitoring the servo motor, and when the torque value is equal to the zero-return preset value, the position of the machine tool can be judged to be the zero-return point.
In this embodiment, the lead screw nut receives and acts on the buffering spacing position when carrying out the zeroing operation, because the buffering effect of buffering spacing position, the damage to lead screw nut receiving and lead screw guide rail receiving caused by the impact of lead screw nut receiving has been avoided, the normal clear operation of zeroing operation has been guaranteed, in addition, buffer block receiving possesses certain elasticity, namely possess certain elastic deformation ability for buffering spacing position, make servo system control servo motor receive continuously provide power and make the moment of torsion that acts on lead screw nut receiving increase and cause the damage to the lathe, and then be favorable to the going on of zeroing operation, therefore, when servo system compares and judges that the moment of torsion value that acts on lead screw nut receives is equal to the zero default value of former settlement in rising edge part, the encoder of one of key spare part in the servo system sends the zero position signal immediately, mark this position and be the zeroing point of lathe, servo system and synchronous send control stop command to servo motor receive in order to suspend the continuous output of moment of torsion, accomplish the operation of zeroing, judge that the operation is quick.
Further, in the step S3, after the lead screw nut moves to the buffering limit position and the torque value is equal to the zero-return preset value, the machine tool torque zero-return method further includes:
step S31: the screw nut is retracted for a preset pitch distance at a second speed;
step S32: the servo system monitors the current position value of the screw nut, and the encoder sends the zero position signal. The preset pitch distance is preferably 2 to 3 pitches, but is not limited to the preferred setting, the step of backing back the screw nut through the preset pitch distance avoids the screw nut acting on the position of the screw guide rail for a long time, namely, the screw teeth of the screw guide rail are subjected to long-time load application, and the screw teeth of the screw guide rail are worn, so that the protection of a machine tool in the zeroing operation is further realized, in particular, the matching precision between the screw nut and the screw guide rail is protected, and the purpose of protecting the machine tool under the premise of precise zeroing is also realized.
Further, in the step S3, after the screw-nut retreats the preset pitch distance and detects and obtains the current position value, the machine tool performs repeated fine calibration for multiple times according to the preset times, and the encoder provides the zero position signal to the machine tool when the fine calibration is finished, so that the accuracy of the torque zero-returning method of the machine tool is further improved.
Further, the fine calibration comprises the following steps:
step S33: the screw nut moves towards the buffering limit position until the torque value is equal to the zero resetting preset value;
step S34: and the screw nut retreats the preset pitch distance at a fifth speed and detects and acquires a current position value.
Further, the fifth speed is proportional to the second speed, and the ratio is 1, 1/10, 1/100.
Further, in step S2, the two ends of the screw mechanism are respectively provided with the buffer limit positions, and after step S3, that is, after the precision calibration is completed and the encoder provides the zero position signal to the machine tool, the machine tool torque zeroing method further includes the following steps:
step S4: the screw nut moves to the other buffer limit position again at a third speed;
step S5: the servo system monitors the rising edge of the servo motor in real time to feed back the torque value until the torque value is equal to the zero-return preset value, and confirms the second zero-return point of the machine tool through a second zero-point position signal provided by the encoder.
Further, in the step S5, after the screw nut moves to the other buffer limit position to obtain the torque value equal to the zero-return preset value, the machine tool torque zero-return method further includes:
step S51: the screw nut retreats by the second preset screw pitch distance at a fourth speed;
step S52: the servo system monitors the current position value of the lead screw nut and the encoder sends the second zero position signal.
Further, in the step S5, after the screw nut retreats the second preset pitch distance and detects and obtains the current position value, the machine tool repeats the calibration multiple times according to the preset times, and the encoder provides the second zero position signal to the machine tool when the calibration is finished.
Further, the first speed is greater than the second speed.
Further, the fourth speed is equal to the second speed.
In summary, the machine tool torque zeroing method provided by the invention has the following technical effects:
1) The torque value output by a servo system of the machine tool is compared with a zero-return preset value, when the torque value acted on a buffering limit position by a screw nut is equal to the zero-return preset value, the mechanical zero-return of the machine tool is directly judged, the operation steps are simple and effective, the purposes of automatically confirming the zero-return point and precisely confirming the zero-return point in the prior art by manually detecting are achieved, the operability of the numerical control machine tool is remarkably improved, the screw guide rail module is effectively protected, and the service life of the machine is prolonged;
2) The screw rod mechanism is provided with a buffering limit position, and the servo system controls the servo motor to receive continuous power under the action of the buffering limit position, so that the torque acted on the screw rod nut is increased to damage the machine tool, and zero return operation is facilitated;
drawings
FIG. 1 is a control flow chart of embodiment 1 of the present invention;
FIG. 2 is a control flow chart of embodiment 2 of the present invention;
FIG. 3 is a control flow chart of embodiment 3 of the present invention;
FIG. 4 is a control flow chart of embodiment 4 of the present invention;
fig. 5 is a schematic diagram of the machine tool structure in the machine tool torque return to zero according to the invention.
Wherein the reference numerals have the following meanings:
1. a screw guide rail; 2. a buffer block; 3. a servo motor; 4. and a screw nut.
Detailed Description
For a better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
In accordance with an embodiment of the present invention, a machine tool torque return to zero method is provided, it being noted that the steps shown in the flowchart of the figures may be performed in a computer system, such as a set of computer executable instructions, and, although a logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than what is shown herein.
Example 1
Referring to fig. 1 and 5, the invention discloses a machine tool torque zero-returning method, which has the advantages that the torque value of a servo system is directly compared with a zero-returning preset value to confirm mechanical zero-returning, and the method specifically comprises the following steps:
step S1: setting a zeroing preset value on the servo system, wherein in the step, the servo system synchronously sets other related parameters such as rotating speed, coordinate coefficient and the like, and the servo motor sets corresponding encoders so as to ensure the normal operation of the servo system and prepare for the follow-up zeroing operation;
step S2: a buffer limit position is arranged on a screw rod mechanism, a servo system drives a screw rod nut 4 of the screw rod mechanism to move towards the buffer limit position at a first speed, and particularly, a fixed buffer block 2 is arranged at the end part of a screw rod guide rail 1, wherein the buffer block 2 can be a silica gel block, the screw rod guide rail 1 can be driven to rotate through a servo motor 3, the servo system in the steps is started after preparation, the moving direction of the screw rod nut 4 is confirmed, namely, the direction facing the buffer limit position is confirmed, and then the servo system sends a control instruction to enable the servo motor 3 to rotate so that the screw rod nut 4 moves towards the buffer block 2 at the first speed, and the screw rod nut 4 can slide in an idle mode and can move at a high speed;
step S3: the screw nut 4 moves to a buffering limit position, the servo system monitors the rising edge of the servo motor in real time to feed back a torque value until the torque value is equal to a zero-return preset value, a zero-return point of the machine tool is confirmed through a zero-point position signal provided by the encoder, specifically, after the screw nut 4 impacts the buffer block 2, the servo system provides torque through monitoring the servo motor 3 to judge the torque acting on the screw nut 4, and when the torque value is equal to the zero-return preset value, the position of the machine tool can be judged to be the zero-return point.
In this embodiment, the lead screw nut 4 acts on the buffering limit position during the zero-returning operation, and due to the buffering effect of the buffering limit position, the damage to the lead screw nut 4 and the lead screw guide rail 1 caused by the impact of the lead screw nut 4 is avoided, the normal zero-returning operation is ensured, in addition, the buffer block 2 has a certain elasticity, that is, has a certain elastic deformation capability for the buffering limit position, so that the servo system controls the servo motor 3 to continuously provide power to increase the torque acting on the lead screw nut 4, thereby damaging the machine tool, further facilitating the zero-returning operation, therefore, when the servo system compares and judges that the rising edge part of the torque value acting on the lead screw nut 4 is equal to the zero-returning preset value set in the original, the encoder of one of key parts in the servo system immediately sends a zero-returning position signal, marks the zero-returning point of the machine tool, and synchronously sends a control stop command to the servo motor 3 to stop the continuous output of the torque, thereby completing the zero-returning operation.
Example 2
In step S3 of the above embodiment 1, a step may be added after the screw nut 4 moves to the buffering limit position and obtains that the torque value is equal to the zero-return preset value, and specifically referring to fig. 2 and 5, the machine tool torque zero-return method further includes the following steps:
step S31: the screw nut 4 is retracted at a second speed by a preset pitch distance;
step S32: the servo system monitors the current position value of the screw nut 4 and the encoder sends a zero position signal.
In this embodiment, the preset pitch distance is preferably 2 to 3 pitches, but is not limited to the preferred setting, and the step of backing up the screw nut 4 by the preset pitch distance avoids the situation that the screw nut 4 acts on the position of the screw guide rail 1 for a long time, that is, the screw teeth of the position of the screw guide rail 1 are subjected to long-time load application, and the screw teeth of the screw guide rail 1 are worn, so that protection of a machine tool in the zeroing operation is further realized, particularly, the matching precision between the screw nut 4 and the screw guide rail 1 is protected, wherein when the position of the screw nut 4 is judged to obtain a torque value equal to the zeroing preset value before backing up, the change of the precise zeroing position is not avoided, and thus the problem of inaccurate mechanical zeroing positioning is caused, and the screw nut 4 backs up at a low speed, that is, the first speed is greater than the second speed;
in synchronization, during the rollback process of the screw nut 4, the servo system can monitor the torque value and the current position value of the screw nut 4 in real time until the screw nut 4 performs the preset nut distance, that is, the screw nut 4 reaches the preset rollback position, the encoder sends a zero position signal and the servo system sends a control signal to stop the servo motor 3, and the zero return of the machine tool is confirmed, so that the purpose of protecting the machine tool under the premise of accurately returning to zero is still realized.
Example 3
In the machine tool torque zeroing method provided in embodiment 1 and embodiment 2, only confirmation that the torque value is equal to the zeroing preset value is completed, and the zero position accuracy is not high is confirmed;
in order to solve the above-mentioned problems, the inventor provides a method for zeroing the torque of a machine tool based on the above-mentioned embodiment 2, in the above-mentioned step S3, after the screw nut 4 is retracted by a preset screw pitch distance and the current position value is detected and obtained, a step may be added, specifically please refer to fig. 3 and 5, the machine tool performs repeated fine calibration for a plurality of times according to the preset times, and the encoder provides a zero position signal to the machine tool when the fine calibration is finished.
Wherein, the accurate calibration includes the following steps:
step S33: the screw nut 4 moves towards the buffering limit position until the torque value is equal to the zero resetting preset value, specifically, the screw nut 4 moves towards the direction of the buffering block 2 to strike or contact the buffering block 2 again until the servo system monitors that the torque value is equal to the zero resetting preset value again, and the next step is carried out;
step S34: the screw nut 4 is retracted at a fifth speed to preset the pitch distance and detect and acquire the current position value, namely, the screw nut 4 is retracted again at a low speed to preset the pitch distance, so that the acting force of the screw guide rail 1 on the position with the torque value equal to the zero preset value is removed, the screw nut 4 and the screw guide rail 1 are protected, the screw guide rail 1 are synchronous, the current position value is dynamically monitored in real time by a servo system in the retraction process, and accurate detection of the retracted position is guaranteed.
Here, the fifth speed and the second speed form a proportion, and the lead screw nut 4 can rollback at a low speed according to the second speed, and the proportion value of the proportion is 1, so that the proportion value of the proportion is preferably 1/10, 1/100, but is not limited to other proportion values in order to further improve the accurate detection of the current position value of rollback. In addition, in the process of performing fine calibration on the machine tool for multiple times according to the preset times, the speed of each rollback of the screw nut 4 can be preferably adjusted according to the ratio of 1/10 to 1/100 based on the first rollback speed, but the method is not limited to the scheme, and the rollback speed is adjusted according to the technological processing requirement or the requirement of an actual operator on the operation precision of the machine tool.
Therefore, as can be seen from the above, the present embodiment aims to further improve the accuracy of the machine tool torque zeroing method, and is shown in fig. 3, wherein steps S31 and S32 are omitted in fig. 3 to avoid misunderstanding caused by overlapping with steps S33 and S34, and the machine tool torque zeroing method specifically includes the following steps:
step S1: setting a zero resetting preset value on the servo system;
step S2: a buffer limit position is arranged on the screw rod mechanism, and the servo system drives the screw rod nut 4 of the screw rod mechanism to move towards the buffer limit position at a first speed;
step S3: the screw nut 4 moves to a buffering limit position, and the servo system monitors the rising edge of the servo motor in real time to feed back the torque value until the torque value is equal to a zero-returning preset value;
step S31: the screw nut 4 is retracted at a second speed by a preset pitch distance;
step S32: the servo system detects and acquires a current position value;
step S33: the screw nut 4 moves to the buffering limit position until the torque value is equal to the zero-returning preset value;
step S34: the screw nut 4 retreats a preset pitch distance at a fifth speed and detects and acquires a current position value;
and step S35, repeating the step S33 and the step S34 until the accurate calibration is finished for a preset number of times, and providing a zero position signal to a servo system by an encoder to confirm the zero return point of the machine tool.
Example 4
In the machining process, the effective stroke of the numerical control machine tool determines whether the numerical control machine tool can finish machining of the part, and beyond the effective stroke, the machining of the part cannot be finished, the service life, the machining precision, the running stability and the like of the machine tool equipment can be influenced, the determination of the effective stroke of the existing machine tool is mainly determined manually, and the determination precision of the effective stroke is not high.
Regarding the problem of the effective stroke proposed above, the inventor proposes an application of a machine tool torque zeroing method based on embodiment 3, so as to solve the problem of confirming the effective stroke of the numerically-controlled machine tool manually in the prior art, specifically, please refer to fig. 4 and 5, wherein two buffering and limiting positions are provided, specifically, when step S2 is performed, two buffering and limiting positions are provided at two ends of the screw mechanism, specifically, two buffering blocks 2 are provided at two sides of the screw guide rail 1;
after the step S3, the setting of the buffer limit positions is completed, and after the accurate calibration is completed and the encoder provides the zero position signal to the machine tool, the machine tool completes the zeroing of one of the buffer limit positions, and the machine tool torque zeroing method further includes the following steps:
step S4: the screw nut 4 moves to another buffer limit position again at the third speed, specifically, after the screw nut 4 collides with one buffer block 2 in the steps S1 to S3 to detect the return zero point, the screw nut moves to the other buffer block 2 in the opposite direction on the screw guide rail 1 and collides with the other buffer block 2;
step S5: the servo system monitors the rising edge of the servo motor in real time to feed back the torque value until the torque value is equal to a zero-return preset value, and confirms a second zero-return point of the machine tool through a second zero-point position signal provided by the encoder.
In this embodiment, the lead screw nut 4 moves from the buffer limit position to the other buffer limit position in an idle manner, so that the lead screw nut 4 can move at a high speed to shorten the running time of the lead screw nut 4, and the third speed is equal to the first speed, and the third speed is slightly greater than the first speed. Therefore, when the screw nut 4 moves to the other buffer limit position and the torque value detected by the servo system is equal to the zero-returning preset value, the servo system can judge the second zero-returning point of the other buffer limit position, and further, the effective stroke of the screw mechanism can be calculated; here, when the numerical control machine is a multi-axis numerical control machine, the effective stroke of the screw mechanism in each axial direction can be calculated by performing detection according to the above steps.
Further, referring to fig. 4 specifically, in step S5, after the screw nut 4 moves to another buffer limit position to obtain a torque value equal to the zero-returning preset value, the machine tool torque zero-returning method further includes the following steps:
step S51: the screw nut 4 is retracted by a second preset pitch distance at a fourth speed;
step S52: the servo system monitors the current position value of the screw nut 4 and the encoder sends a second zero position signal.
The second preset pitch distance is preferably 2 to 3 pitches, but is not limited to the preferred setting, and the step of retracting the lead screw nut 4 through the second preset pitch distance enables the lead screw nut 4 to be prevented from acting on the position of the lead screw guide rail 1 for a long time when the zeroing operation of the other position of the lead screw mechanism is performed, that is, the threads of the position of the lead screw guide rail 1 are subjected to long-time load application, and the threads of the lead screw guide rail 1 are worn, so that the lead screw nut 4 and the lead screw guide rail 1 are effectively protected. Here, the fourth speed is preferably equal to the second speed, and the screw nut 4 is retracted slowly, so that the servo system can detect the current position value of the screw nut 4 more accurately, and synchronously, during the retraction process of the screw nut 4, the servo system can monitor the torque value and the current position value of the screw nut 4 in real time until the screw nut 4 performs a second preset nut distance, that is, the screw nut 4 reaches the preset retraction position, the encoder will send a zero position signal, and the servo system sends a control signal to stop the servo motor 3, so as to confirm the second zero return of the machine tool.
Further, in order to improve the accuracy of confirming the second zero position, as shown in fig. 4, in the step S5, after the screw nut 4 retreats the second preset pitch distance and detects to obtain the current position value, the machine tool performs multiple fine calibration according to the preset times, and the encoder provides the zero position signal to the machine tool when the fine calibration is finished, wherein the fine calibration is the same as the fine calibration step described in embodiment 3, that is, the fine calibration step includes the following steps: the screw nut 4 moves to the second buffering limit position until the torque value is equal to the zero-returning preset value; the screw nut 4 is retracted by a second preset pitch distance at a second speed in a proportion, and the current position value is detected and acquired, wherein the proportion can be 1/10 or 1/100.
Therefore, as can be seen from the above, the method for zeroing the torque of the machine tool, which can obtain the effective stroke, is implemented by the following specific steps:
step S1: setting a zero resetting preset value on the servo system;
step S2: a buffer limit position is arranged on the screw rod mechanism, and the servo system drives the screw rod nut 4 of the screw rod mechanism to move towards the buffer limit position at a first speed;
step S3: the screw nut 4 moves to a buffering limit position, and the servo system monitors the rising edge of the servo motor in real time to feed back the torque value until the torque value is equal to a zero-returning preset value; the screw nut 4 is retracted at a second speed by a preset pitch distance;
step S31: the screw nut 4 is retracted at a second speed by a preset pitch distance;
step S32: the servo system detects and acquires a current position value;
step S33: the screw nut 4 moves to the buffering limit position until the torque value is equal to the zero-returning preset value;
step S34: the screw nut 4 retreats at a fifth speed by a preset pitch distance, and detects and acquires a current position value;
step S35, repeating the step S33 and the step S34 until the accurate calibration is completed for a preset number of times, and providing a zero position signal to the machine tool by the encoder to confirm the zero return point of the machine tool;
step S4: the screw nut 4 moves to the other buffer limit position again at the third speed;
step S5: the servo system monitors the rising edge of the servo motor in real time to feed back the torque value until the torque value is equal to a zero-return preset value;
step S51: the screw nut 4 is retracted by a second preset pitch distance at a fourth speed;
step S52: the servo system monitors the current position value of the screw nut 4, and the encoder sends a second zero position signal;
step S53: the screw nut 4 moves to the other buffer limit position until the torque value is equal to the zero-returning preset value;
step S54: the screw nut 4 retreats by a second preset screw pitch distance at a second speed of 1/10 and 1/100, and detects and acquires a current position value;
step 55, repeating the step 53 and the step 54 until the accurate calibration is completed for a preset number of times, and providing a second zero position signal to the machine tool by the encoder to confirm a second zero return of the machine tool;
step S6: the distance between the zero return point and the second zero return point of the machine tool is calculated and is the effective travel of the machine tool.
The method for zeroing the torque of the machine tool combines the torque value and the motion principle, can efficiently and accurately find out the zero point of the machine tool and the effective stroke of each shaft, saves a great deal of labor cost and improves the working efficiency. Compared with the traditional method, the method has the advantages that the material and mechanical space are saved and the installation difficulty is reduced by finding the zero position according to the zero return signal.
The technical means disclosed by the scheme of the invention is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (9)
1. A machine tool torque return to zero method, comprising the steps of:
step S1: setting a zero resetting preset value on the servo system;
step S2: a buffer limit position is arranged on the screw rod mechanism, and a servo system drives a screw rod nut of the screw rod mechanism to move towards the buffer limit position at a first speed;
step S3: the screw rod nut moves to the buffering limit position, the servo system monitors the rising edge of the servo motor in real time to feed back a torque value until the torque value is equal to the zero-return preset value, and a zero-return point of the machine tool is confirmed through a zero-point position signal provided by an encoder;
in the step S3, after the lead screw nut moves to the buffering limit position and the torque value is equal to the zeroing preset value, the method further includes the following steps:
step S31: the screw nut is retracted at a second speed by a preset pitch distance;
step S32: the servo system monitors the current position value of the screw nut, and the encoder sends the zero position signal.
2. The machine tool torque zeroing method according to claim 1, wherein in the step S3, after the screw nut is retracted by the preset pitch distance and the current position value is detected and obtained, the machine tool performs repeated fine calibration for a plurality of times according to the preset number of times, and the encoder provides the zero position signal to the machine tool when the fine calibration is finished.
3. The machine torque return to zero method of claim 2 wherein said fine calibration comprises the steps of:
step S33: the screw nut moves towards the buffering limit position until the torque value is equal to the zero resetting preset value;
step S34: and the screw nut retreats the preset pitch distance at a fifth speed and detects and acquires a current position value.
4. A machine tool torque return to zero method in accordance with claim 3 wherein said fifth speed is proportional to said second speed and said ratio is one of 1, 1/10, 1/100.
5. The machine torque zeroing method according to claim 2, wherein in step S2, the two ends of the screw mechanism are respectively provided with the buffer limit positions, and after step S3, that is, after the precision calibration is completed and the encoder provides the zero position signal to the machine tool, the method further comprises the steps of:
step S4: the screw nut moves to the other buffer limit position again at a third speed;
step S5: the servo system monitors the rising edge of the servo motor in real time to feed back the torque value until the torque value is equal to the zero-return preset value, and confirms the second zero-return point of the machine tool through a second zero-point position signal provided by the encoder.
6. The machine tool torque zeroing method according to claim 5, wherein in the step S5, after the lead screw nut moves to the other buffer limit position to obtain the torque value equal to the zeroing preset value, the method further comprises the steps of:
step S51: the screw nut retreats by a second preset screw pitch distance at a fourth speed;
step S52: the servo system monitors the current position value of the lead screw nut and the encoder sends the second zero position signal.
7. The method according to claim 6, wherein in step S5, after the screw nut is retracted by the second preset pitch distance and the current position value is detected, the machine tool performs repeated fine calibration multiple times according to the preset times, and the encoder provides the second zero position signal to the machine tool when the fine calibration is finished.
8. The machine tool torque return to zero method of claim 1 wherein said first speed is greater than said second speed.
9. The machine tool torque return to zero method of claim 6 wherein said fourth speed is equal to said second speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111661026.7A CN114296402B (en) | 2021-12-30 | 2021-12-30 | Machine tool torque zeroing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111661026.7A CN114296402B (en) | 2021-12-30 | 2021-12-30 | Machine tool torque zeroing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114296402A CN114296402A (en) | 2022-04-08 |
| CN114296402B true CN114296402B (en) | 2024-01-05 |
Family
ID=80974230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111661026.7A Active CN114296402B (en) | 2021-12-30 | 2021-12-30 | Machine tool torque zeroing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114296402B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115097851A (en) * | 2022-06-30 | 2022-09-23 | 瑞声光电科技(常州)有限公司 | Control method of direct drive transmission system and related equipment |
| CN115603630B (en) * | 2022-12-14 | 2023-03-10 | 四川大学 | Method for quickly determining reference zero point of servo motor in high-precision situation |
| CN118449410A (en) * | 2024-07-05 | 2024-08-06 | 比亚迪股份有限公司 | Motor control method and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707662A (en) * | 2012-05-15 | 2012-10-03 | 广州数控设备有限公司 | Zero returning control method based on industrial Ethernet bus technology |
| CN104914785A (en) * | 2015-05-14 | 2015-09-16 | 中山市科力高自动化设备有限公司 | Zero returning method using torque limited signal as original point signal |
| CN108345324A (en) * | 2017-12-18 | 2018-07-31 | 武汉滨湖电子有限责任公司 | A kind of electromechanical support leg recycling and control method |
| CN109866223A (en) * | 2019-03-07 | 2019-06-11 | 济南翼菲自动化科技有限公司 | DELTA robot torque small change point methods |
| CN110865560A (en) * | 2019-11-06 | 2020-03-06 | 泰德激光惠州有限公司 | Zero-returning motion control method, terminal device and computer readable storage medium |
| CN113295328A (en) * | 2021-06-30 | 2021-08-24 | 陕西杰创科技有限公司 | Torque wrench calibrating instrument and calibrating method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030160345A1 (en) * | 2002-02-22 | 2003-08-28 | Hsing-Chang Liu | Back pressure control method of injection molding machine driven by servo motor |
-
2021
- 2021-12-30 CN CN202111661026.7A patent/CN114296402B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707662A (en) * | 2012-05-15 | 2012-10-03 | 广州数控设备有限公司 | Zero returning control method based on industrial Ethernet bus technology |
| CN104914785A (en) * | 2015-05-14 | 2015-09-16 | 中山市科力高自动化设备有限公司 | Zero returning method using torque limited signal as original point signal |
| CN108345324A (en) * | 2017-12-18 | 2018-07-31 | 武汉滨湖电子有限责任公司 | A kind of electromechanical support leg recycling and control method |
| CN109866223A (en) * | 2019-03-07 | 2019-06-11 | 济南翼菲自动化科技有限公司 | DELTA robot torque small change point methods |
| CN110865560A (en) * | 2019-11-06 | 2020-03-06 | 泰德激光惠州有限公司 | Zero-returning motion control method, terminal device and computer readable storage medium |
| CN113295328A (en) * | 2021-06-30 | 2021-08-24 | 陕西杰创科技有限公司 | Torque wrench calibrating instrument and calibrating method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114296402A (en) | 2022-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114296402B (en) | Machine tool torque zeroing method | |
| CN106125774B (en) | Double-shaft synchronous motion control device and method based on laser displacement sensor feedback | |
| CN101767292B (en) | Numerically controlled lathe cutting tool compensation system and numerically controlled lathe cutting tool compensation method | |
| EP2299237A2 (en) | Gantry stage orthogonality error measurement method and error compensation method | |
| US9471058B2 (en) | Data acquisition device for acquiring cause of stoppage of drive axis and information relating thereto | |
| EP1987316B1 (en) | Reliable monitoring of the speed in coordinate measuring appliances | |
| CN110296664A (en) | A kind of root canal file outer diameter and taper automatic detection device | |
| CN112775717B (en) | Error correction method for machine tool and machine tool | |
| CN103123477A (en) | Shaft motion control method based on double feedbacks of motor and machine tool location | |
| CN105486255A (en) | Linear guide pair precision detection method | |
| CN1385260A (en) | Quick shape-rgulating multi-point sheet material formation device | |
| CN103034241A (en) | Method of adjusting the position of origin of a machine and a machine having a function for adjusting the position of origin | |
| CN102941252B (en) | Automatic screw straightening device and method | |
| CN107900463A (en) | Deburring method and deburring system based on current control | |
| CN107971858A (en) | Deburring method and deburring system based on moment of torsion control | |
| CN102003953B (en) | Method for measuring form and position deformation of H-shape steel using measuring device | |
| CN207629762U (en) | Deburring system based on moment of torsion control | |
| CN111006706A (en) | Rotating shaft calibration method based on line laser vision sensor | |
| CN112728300B (en) | Leveling system | |
| CN216298510U (en) | Visual servo screw locking robot | |
| KR101271222B1 (en) | CNC lathe | |
| CN113681573A (en) | Self-error-correction processing method for any angle of aluminum profile | |
| CN110900554A (en) | Automatic marking and dotting mechanical device for medium and small platforms | |
| CN111283475A (en) | Dynamic adjusting method for precision of guide rail of large numerical control planer type milling machine body | |
| JP3230594B2 (en) | Position control method and apparatus for electric discharge machine |
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 |