CN221170625U - Screw rod synchronous control system - Google Patents
Screw rod synchronous control system Download PDFInfo
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- CN221170625U CN221170625U CN202323428465.0U CN202323428465U CN221170625U CN 221170625 U CN221170625 U CN 221170625U CN 202323428465 U CN202323428465 U CN 202323428465U CN 221170625 U CN221170625 U CN 221170625U
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- 238000001514 detection method Methods 0.000 claims abstract description 42
- 230000033001 locomotion Effects 0.000 claims abstract description 27
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 6
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- 238000005452 bending Methods 0.000 description 3
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Abstract
The utility model discloses a screw rod synchronous control system, which comprises a machine tool body, a driving device and a control device, wherein a first screw rod, a second screw rod which is arranged in parallel with the first screw rod and a main sliding block which is connected with the first screw rod and the second screw rod are arranged in the machine tool body; the driving device comprises a first driving device for driving the first screw rod to rotate and a second driving device for driving the second screw rod to rotate; the two sides of the main sliding block are respectively provided with a detection device, and the detection devices comprise a first detection device for detecting the rotational movement amount of the first screw rod and a second detection device for detecting the rotational movement amount of the second screw rod; the control device is connected with the detection device and the driving device and is used for controlling the rotation speeds of the first driving device and the second driving device according to the detection results of the first detection device and the second detection device so as to enable the first screw rod and the second screw rod to keep synchronous rotation. The utility model adopts a double-screw parallel transmission structure, thereby improving the precision, rigidity and reliability of screw rod transmission.
Description
Technical Field
The utility model relates to the technical field of screw rod transmission mechanisms, in particular to a screw rod synchronous control system.
Background
In the field of machining, screw drive is a commonly used precision linear motion mechanism. Conventional screw drive systems typically use a single motor to drive a single screw, which drives a slider or table for linear motion. However, this simple single-filament rod driving structure has the following problems:
The motion precision of the single-wire rod driving system is easily affected by errors such as screw pitch errors, coupling errors and the like, motion fluctuation and position deviation are easily generated, and high-precision motion positioning cannot be realized. When the screw rod bears excessive radial force, bending deflection of the screw rod can occur, the movement precision is seriously affected, and the whole transmission system can be invalid due to single-point faults of a motor, a speed reducer and the like.
In order to realize the screw rod transmission with higher precision and higher rigidity, one thinking is to adopt double-screw rod transmission, but the traditional double-screw rod driving has the following problems that the double-screw rod is directly and independently driven by two motors, the precise synchronization of the movement of the two screw rods is difficult to realize, and the sliding block is easy to generate serious inclination deviation; the motion error is difficult to compensate without effective position detection and feedback control, and high-precision synchronization is realized; the load distribution condition of the screw rod cannot be effectively monitored, and a transmission protection function is lacked.
Therefore, how to realize high-precision synchronous motion control of double-wire rod transmission is a technical problem to be solved currently.
Disclosure of utility model
The utility model aims to solve the technical problems that: solves the technical problems and provides a screw synchronous control system which improves the motion precision of a screw transmission mechanism and compensates the motion error in real time.
The technical scheme adopted for solving the technical problems is as follows:
The screw rod synchronous control system comprises a machine tool body, a driving device and a control device, wherein a first screw rod, a second screw rod which is arranged in parallel with the first screw rod and a main sliding block which is connected with the first screw rod and the second screw rod are arranged in the machine tool body;
The driving device comprises a first driving device for driving the first screw rod to rotate and a second driving device for driving the second screw rod to rotate;
the two sides of the main sliding block are respectively provided with a detection device, and the detection devices comprise a first detection device for detecting the rotational movement amount of the first screw rod and a second detection device for detecting the rotational movement amount of the second screw rod;
The control device is connected with the detection device and the driving device and is used for controlling the rotation speeds of the first driving device and the second driving device according to the detection results of the first detection device and the second detection device so as to enable the first screw rod and the second screw rod to keep synchronous rotation.
Preferably, the first driving device and the second driving device comprise a servo motor, a speed reducer and a coupler, and the servo motor is connected with the coupler through the speed reducer and drives the first screw rod and the second screw rod to rotate.
Preferably, the first detection device and the second detection device are grating scales.
Preferably, the difference of the detection results of the grating scale represents the tilt deviation amount of the main slider, and the control means controls the rotational speeds of the first driving means and the second driving means according to the difference so that the tilt deviation amount of the main slider is maintained within a predetermined range.
Preferably, the main sliding block is arranged on the first screw rod and the second screw rod through threaded connection.
Preferably, the control device calculates the load values of the first drive device and the second drive device and generates an alarm signal when the difference in the load values exceeds a predetermined threshold.
Preferably, the control device compares the load values of the first screw and the second screw, and generates an alarm signal when the difference between the load values exceeds a predetermined threshold.
The beneficial effects of the utility model include:
(1) The double-wire rod parallel transmission structure is adopted, so that the rigidity is improved, the bending deflection of the single wire rod is avoided, the rigidity is improved by the double-wire rod transmission, the deflection problem of the single wire rod is avoided, and the movement precision is improved;
(2) The two sides are provided with closed loop detection positions of the grating ruler, full closed loop control is performed, errors are corrected in real time, synchronization accuracy is greatly improved, and control accuracy of up to 0.02mm is realized;
(3) And the control device and the grating ruler are utilized to judge and compensate various motion errors in real time, and the synchronous motion of the double-wire rods is accurately controlled.
Drawings
Fig. 1 is a schematic structural diagram of a screw synchronous control system in embodiment 1;
reference numerals: 1. a machine tool body; 2. a driving device; 3. a first screw rod; 4. a second screw rod; 5. a main slide plate; 6. a grating ruler; 7. a workpiece table top; 8. a servo motor; 9. a speed reducer; 10. a coupling.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings, but these embodiments do not limit the scope of the utility model in any way.
Examples
As shown in fig. 1, a screw synchronous control system comprises a machine tool body 1, a driving device 2 and a control device (not shown in the figure), wherein a first screw 3, a second screw 4 parallel to the first screw 3 and a main sliding block 5 connected with the first screw 3 and the second screw 4 are arranged in the machine tool body 1, the main sliding block 5 is arranged on the first screw 3 and the second screw 4 through threaded connection, and a workpiece table top 7 for placing a workpiece is further arranged on the main sliding block 5.
The driving means 2 comprises first driving means for driving the first screw 3 to rotate and second driving means for driving the second screw 4 to rotate.
The two sides of the main sliding block 5 are respectively provided with a detection device, the detection devices comprise a first detection device for detecting the rotational movement amount of the first screw rod 3 and a second detection device for detecting the rotational movement amount of the second screw rod 4, the first detection device and the second detection device are both grating rulers 6, and the grating rulers 6 are arranged on two sides of the main sliding plate 5 to detect the actual movement amounts of two sides of the main sliding plate 5, so that a full-closed loop control is formed.
The control device is a data processing system arranged outside the machine tool body 1, is electrically connected with the detection device and the driving device 2, and is used for controlling the rotation speed of the first driving device and the second driving device according to the detection results of the two grating scales 6, so that the first screw rod 3 and the second screw rod 4 keep synchronous rotation.
In this embodiment, the first driving device and the second driving device each include a servo motor 8, a speed reducer 9 and a coupling 10, and the servo motor 8 is connected with the screw rod through the speed reducer 9 and the coupling 10 and drives the first screw rod 3 and the second screw rod 4 to rotate.
In the present embodiment, the difference in detection results of the grating scale 6 represents the amount of tilt deviation of the main slider 5, and the control means controls the rotational speeds of the first driving means and the second driving means based on the difference so that the amount of tilt deviation of the main slider 5 is maintained within a predetermined range. Specifically, the control device compares the positions fed back by the grating ruler 6, and then compensates the positions to eliminate deviation of the movement amounts of the two sides of the main slide plate 5 caused by accumulated errors of the speed reducer 9 and the coupler 10.
When the main slide plate 5 moves up and down, the synchronous deviation of the two sides is controlled within 0.02 mm. During machining, the deviation of the two sides of the main sliding plate 5 is small, and the vertical precision of machined parts is improved.
In this embodiment, the control device also compares the loads of the two screw rods 3 and 4, and when the load deviation is greater than 6%, an alarm prompt is given. When the load deviation of the two motors 8 exceeds 6% due to the abnormality of mechanical parts such as the speed reducer 9, the control device also sends out an alarm prompt to prompt that the machine tool 1 needs to be maintained.
The working principle and method of the screw rod synchronous control system in the embodiment are as follows:
The two groups of servo motors 8 drive the first screw rod 3 and the second screw rod 4 to rotate respectively to drive the main sliding block 5 to move, the first screw rod 3 and the second screw rod 4 are arranged in parallel, the main sliding block 5 is arranged on the first screw rod 3 and the second screw rod 4 through threaded connection, the grating scales 6 are respectively arranged on two sides of the main sliding block 5, and the grating scales 6 detect actual displacement distances of the main sliding block 5 on the first screw rod 3 and the second screw rod 4.
The detection signals of the grating rulers 6 are fed back and transmitted to the control device, the control device compares the feedback values of the two grating rulers 6, and controls the rotating speeds of the two servo motors 8 according to the difference value of the feedback values, so that the rotating speeds of the first screw rod 3 and the second screw rod 4 are kept highly synchronous, the inclination deviation of the main sliding block 5 is reduced, and the synchronous deviation of the two sides is controlled within 0.02 mm. If the load deviation of the first screw rod 3 and the second screw rod 4 is larger than 6%, an alarm prompt is given, and when the load deviation of the two motors 8 exceeds 6% due to the abnormality of mechanical parts such as the speed reducer 9, the control device also gives out an alarm prompt to prompt that the machine tool 1 needs to be maintained.
The beneficial effects achieved by the technical scheme include the following points:
The double-wire rod parallel transmission structure is adopted, so that the rigidity is improved, the bending deflection of the single wire rod is avoided, the rigidity is improved by the double-wire rod transmission, the deflection problem of the single wire rod is avoided, and the movement precision is improved;
The two sides are provided with closed loop detection positions of the grating ruler, full closed loop control is performed, errors are corrected in real time, synchronization accuracy is greatly improved, and control accuracy of up to 0.02mm is realized;
The control device and the grating ruler are utilized to judge and compensate various motion errors in real time, and the synchronous motion of the double-wire rod is accurately controlled;
The motor load monitoring function is added through the control device, so that transmission protection is realized, and the reliability of system operation is improved.
The foregoing has outlined and described the basic principles, features, and advantages of the present invention. It will be appreciated by persons skilled in the art that the present invention is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims.
Claims (7)
1. The screw rod synchronous control system comprises a machine tool body, a driving device and a control device and is characterized in that a first screw rod, a second screw rod which is arranged in parallel with the first screw rod and a main sliding block which is connected with the first screw rod and the second screw rod are arranged in the machine tool body;
The driving device comprises a first driving device for driving the first screw rod to rotate and a second driving device for driving the second screw rod to rotate;
the two sides of the main sliding block are respectively provided with a detection device, and the detection devices comprise a first detection device for detecting the rotational movement amount of the first screw rod and a second detection device for detecting the rotational movement amount of the second screw rod;
The control device is connected with the detection device and the driving device and is used for controlling the rotation speeds of the first driving device and the second driving device according to the detection results of the first detection device and the second detection device so as to enable the first screw rod and the second screw rod to keep synchronous rotation.
2. The screw synchronization control system according to claim 1, wherein the first driving device and the second driving device each comprise a servo motor, a speed reducer and a coupling, and the servo motor is connected with the coupling through the speed reducer and drives the first screw and the second screw to rotate.
3. The lead screw synchronous control system of claim 1, wherein the first and second detection devices are grating scales.
4. A screw synchronization control system according to claim 3, wherein the difference in the detection result of the grating scale represents the amount of tilt deviation of the main slider, and the control means controls the rotational speeds of the first driving means and the second driving means based on the difference so that the amount of tilt deviation of the main slider is maintained within a predetermined range.
5. The lead screw synchronous control system of claim 1, wherein the main slider is disposed on the first lead screw and the second lead screw by a threaded connection.
6. The lead screw synchronous control system according to claim 1, wherein the control means calculates a load value of the first driving means and the second driving means and generates an alarm signal when a difference of the load values exceeds a predetermined threshold value.
7. The lead screw synchronous control system of claim 1, wherein the control device compares the load values of the first lead screw and the second lead screw and generates an alarm signal when the difference in the load values exceeds a predetermined threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323428465.0U CN221170625U (en) | 2023-12-15 | 2023-12-15 | Screw rod synchronous control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323428465.0U CN221170625U (en) | 2023-12-15 | 2023-12-15 | Screw rod synchronous control system |
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| Publication Number | Publication Date |
|---|---|
| CN221170625U true CN221170625U (en) | 2024-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323428465.0U Active CN221170625U (en) | 2023-12-15 | 2023-12-15 | Screw rod synchronous control system |
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| Country | Link |
|---|---|
| CN (1) | CN221170625U (en) |
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2023
- 2023-12-15 CN CN202323428465.0U patent/CN221170625U/en active Active
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