CN103433882A - Current feedback type numerical control electric screw driver and control method - Google Patents
Current feedback type numerical control electric screw driver and control method Download PDFInfo
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- CN103433882A CN103433882A CN2013103895004A CN201310389500A CN103433882A CN 103433882 A CN103433882 A CN 103433882A CN 2013103895004 A CN2013103895004 A CN 2013103895004A CN 201310389500 A CN201310389500 A CN 201310389500A CN 103433882 A CN103433882 A CN 103433882A
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Abstract
The invention discloses a current feedback type numerical control electric screw driver. The current feedback type numerical control electric screw driver comprises a control cabinet and a screw driver body, wherein the control cabinet is connected with the screw driver body through a control cable, a controller and a switching power source are arranged in a cabinet body of the control cabinet, a motor, a motor reduction gearbox and a driving shaft are arranged in a barrel body of the screw driver body, and a connector and a screw driver bit are arranged at the two ends of the barrel body respectively. A control method of the current feedback type numerical control electric screw driver comprises the steps that after the current feedback type numerical control electric screw driver is started, the controller carries out detection on the rotary angle and the torque, and preferably selects to carry out the screw meshing step or the rapid screwing step or the screw locking step or the standby step according to the torque, and meanwhile the controller has the fault detection function, and selects to enter the standby step or to maintain the standby step or to start the screw driver locking function when the screw loose fault state or the floating locking fault state exists. The current feedback type numerical control electric screw driver has the automatic control function, the data management function, the monitoring mistake-proof function and the like, is efficient, safe, convenient to use and high in quality, and can meet different processing requirements.
Description
Technical field
The present invention relates to a kind of screwdriver, especially a kind of Current feedback numerical control electric screwdriver and control method.
Background technology
Screwdriver is the instrument for the turn of the screw, has obtained generally application in people's production and life.China is manufacturing powerhouse, and along with the development of the industries such as automobile, space flight, machinery, the automatic control level that improves screwdriver becomes development trend.When screwdriver realizes that automation is controlled, Torque Control precision and the intelligence of screwdriver is required also improving constantly, and the control accuracy of product moment is higher, just can be applied to better in the middle of the assembling to various precision parts.
Current screwdriver on the market mainly is divided into three kinds, and the first is the mechanical clutch structure, complex structure, precision is lower, maintenance cost is high, and the second is the structure with torque sensor, and precision is very high but expensive, the third employing be the current type structure, precision is high, simple in structure, no material consumption, environmental protection, thus be used widely.In existing electric screw driver, the invention that application publication number is CN102794732A provides a kind of screwdriver, it has the drive unit that comprises motor, described motor lotus root is connected to driving shaft in order to drive to be scheduled to tightening torque the instrument that drives operation for completing screw, described chasing tool is useful on the current sensor that detects current of electric, there is the control device for accessory drive, control device is designed to brake when reaching Brake Standards, and calculate the threshold value of current of electric in order to determine switching standards and change to holding state based on predetermined tightening torque, this electric screw driver precision is higher, but do not possess the monitoring error-disable function, function singleness, can not fully meet diversified processing needs, the aspects such as speed control in the turn of the screw process also need to improve to increase work efficiency better simultaneously.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of Current feedback numerical control electric screwdriver and control method, can realize the functions such as automatic control, data management and monitoring mistake proofing, precision is high, easy to use, safe and reliable, can adapt to different processing needs and increase work efficiency.
Technical scheme of the present invention is: a kind of Current feedback numerical control electric screwdriver, comprise control cabinet and screwdriver, described control cabinet is connected by dismountable control cables with screwdriver, it is characterized in that: described control cabinet comprises casing, described casing is provided with power switch, external power interface, cable interface and display screen, be provided with controller and Switching Power Supply in casing, controller comprises microprocessor, memory, motor drive module and display module, described microprocessor respectively with memory, motor drive module is connected with the display module circuit, motor drive module is connected with the cable interface circuit, display module is connected with the display screen circuit, Switching Power Supply is connected with the external power interface circuit with power switch respectively, described screwdriver comprises cylindrical shell, be provided with connected motor in cylindrical shell, motor reduction gearbox and driving shaft, the cylindrical shell two ends are respectively equipped with connector and criticize and chew, criticize to chew with driving shaft and be connected.
Be provided with filtration module in described Switching Power Supply.
The position sensor that there is at least one detection rotor position in described motor.
Preferably, described position sensor is Hall element.
Described motor is non-carbon brush motor.
Described casing is provided with signal output interface, PC communication interface and the usb data interface be connected with controller circuitry.
The described cylindrical shell outside is provided with the axial compressive force mechanism that regulates each screw by axial guidance and spring.
Described controller and signal lamp connection, signal lamp is positioned at outside casing, in malfunctions such as sliding tooth or floating locks, sending corresponding early warning signal.
A kind of control method of Current feedback numerical control electric screwdriver, chewed screw driving operation for driving by controller to criticize, it is characterized in that: desired value, higher limit and the lower limit of setting moment of torsion and corner according to the processing needs, after starting, controller is detected corner and moment of torsion respectively, and preferentially according to moment of torsion, selects to carry out following steps:
-screw interlock step, manually control or make to criticize to chew to press down the aligning screw cap by the controller that is provided with start-up time, after starting, controller detects moment of torsion by motor current signal, position sensor detects the motor position of rotation and provides the corner current signal to controller, by controller, it reached current feed to motor and keep lower-speed state (as kept 100-300), until controller detects predetermined corner one;
-Quick fastening step, controller carry out current feed and make motor by low speed rotation at a high speed, until controller detects predetermined corner two, make again motor keep high speed rotating, until controller detects predetermined corner three, then controller carries out current feed and makes motor by high speed steering low speed, until controller detects predetermined corner four;
-screw locking step, controller carries out current feed and makes motor keep lower-speed state, until controller detects target torque and target rotation angle, now will send and tighten signal;
-standby step, manually control or make to criticize by controller and chew the disengaging screw cap, and controller will still keep the current feed of specific degrees or stop current feed;
The numerical value of described predetermined corner one, two, three, four is all proportional with the numerical value of target rotation angle;
Described controller has the functions such as data record and inquiry, for parameters such as record and query time, corner, moment of torsion and speed;
When mechanical disorder, screw hole is bad, screw is bad and the factor such as workpiece specific materials can increase fault rate: wooden workpiece, plastics part, sheet metal are processed, when perhaps screwed hole is loose, easily cause screw slippage or idle running and form sliding dental phenomenon, when screwed hole is tight or screw when bad, easily cause not being locked into the end or tighten rear bad order and form floating lock status;
Described controller has fault detection capability, for detection of sliding tooth or two kinds of malfunctions of floating lock, sliding dental phenomenon refers to while arriving target rotation angle, thereby controller does not detect target torque yet without tightening signal (as by screw thread bad causing of distance), floating lock status refers to and arrives target torque and produce while tightening signal, controller does not detect target rotation angle (strengthening as tightly caused resistance by the workpiece screw hole) yet, and controller can further have floating lock sensing function;
Carrying out the screw locking step or the standby step all may detect sliding dental phenomenon, and above-mentioned four steps all may detect floating lock status, selection enters the standby step, keeps the standby step or starts the screwdriver lock function, and exportable corresponding early warning signal, removing the screwdriver lock-out state needs the user to input password on display screen.
Beneficial effect of the present invention is:
1, there is good man machine operation interface, realized the automation control of height, can be advantageously applied to the assembling field of auto parts and components, space flight assembly or precision optical machinery, can preset the parameters such as moment of torsion, time, speed, corner, direction of rotation by display screen, support the mission mode of assembling demand more than 6 kinds, the speed in the rundown process that realized is controlled, and than prior art, has significantly improved operating efficiency;
2, possesses programmable functions, can need to set corresponding program according to different processing, the program memory function is realized by memory, possess data record, inquiry and export function simultaneously, but the related datas such as instant playback moment of torsion, corner, by the analysis to the rundown process data, can further optimize parameters to obtain best processing effect;
3, there is the monitoring error-disable function, can accurately detect and record sliding tooth or two kinds of malfunctions of floating lock, and there is the screwdriver lock function, safer reliable, but outer signal lamp also, and realize the multiple modes of warnings such as sound, color, word;
4, dispose non-carbon brush motor and Hall element, precision is high, non-maintaining, easy to use, be provided with the flexibility design such as axial compressive force mechanism, promote security, also possess outsidely start, tighten circulated, the functions such as password locking on the signal input/output function such as screwdriver fault and display screen, diverse in function, fully adapt to different processing needs.
The accompanying drawing explanation
The structural representation that Fig. 1 is control cabinet of the present invention;
The structural representation that Fig. 2 is screwdriver of the present invention;
Fig. 3 has meaned the relation between the moment of torsion in different step, speed and corner in the present invention;
Fig. 4 has meaned the relation between moment of torsion and corner under sliding dental phenomenon;
Fig. 5 has meaned the relation between moment of torsion and corner under floating lock status.
In figure, the 1-casing, the 2-Switching Power Supply, the 3-controller, the 4-display screen, the 5-cylindrical shell, the 6-motor, the 7-motor reduction gearbox, the 8-driving shaft, 9-criticizes and chews, the 10-connector.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
A kind of Current feedback numerical control electric screwdriver, comprise control cabinet and screwdriver, control cabinet is connected by dismountable control cables with screwdriver, as shown in Figure 1, control cabinet comprises casing 1, casing 1 is provided with power switch, external power interface, cable interface and display screen 4, is provided with controller 3 and Switching Power Supply 2 in casing 1, the built-in filtration module of Switching Power Supply 2;
The signal output interface that controller 3 also is provided with casing 1 respectively, PC communication interface and usb data interface circuit are connected, and to realize data management function, the signal lamp connection that controller 3 and casing 1 are outer, for realizing the warning function under malfunction;
As shown in Figure 2, screwdriver comprises cylindrical shell 5, be provided with connected motor 6, motor reduction gearbox 7 and driving shaft 8 in cylindrical shell 5, motor 6 is non-carbon brush motor 6, and be provided with the Hall element of 3 detection rotor positions in motor 6, cylindrical shell 5 two ends are respectively equipped with connector 10 and batch chew 9, batch chew 9 to be connected with driving shaft 8.
During concrete enforcement, control method of the present invention, be that chewing 9 by controller 3 drivings batch completes screw driving operation, first according to processing, need to set desired value, higher limit and the lower limit of moment of torsion and corner, after starting, controller 3 is detected corner and moment of torsion respectively, and preferentially according to moment of torsion, selects to carry out screw interlock, Quick fastening, screw locking or standby step:
As shown in Figure 3, in screw interlock step, controller 3 makes current feed to motor 6 it reach and keeps lower-speed state, until controller 3 detects predetermined corner one, in the Quick fastening step, controller 3 carry out current feed and make motor 6 by low speed rotation at a high speed, until controller 3 detects predetermined corner two, make again motor 6 keep high speed rotating, until controller 3 detects predetermined corner three, then controller 3 carries out current feed and makes motor 6 by high speed steering low speed, until controller 3 detects predetermined corner four, in the screw locking step, control is carried out current feed and is made motor 6 keep lower-speed state, until controller 3 detects target torque and target rotation angle, now will send and tighten signal and enter the standby step.
During concrete enforcement, when mechanical disorder, screwed hole is bad, screw is bad and the factor such as workpiece specific materials can increase fault rate and cause sliding tooth or two kinds of malfunctions of floating lock:
As shown in Figure 4, thereby sliding dental phenomenon refers to controller and target torque do not detected yet without tightening signal when arriving target rotation angle, with respect to calibration curve, different torque curves is corresponding to different sliding dental phenomenons, as can be formed not sliding dental phenomenon (1) (not reaching the moment of torsion desired value) by thickness of workpiece, or by the bad sliding dental phenomenon (2) (not reaching the moment of torsion desired value) that forms of screw thread distance, or can form sliding dental phenomenon (3) (not reaching the lower torque limit value) by workpiece screw hole pine;
As shown in Figure 5, floating lock status refers to and arrives target torque and produce while tightening signal, controller 3 does not detect target rotation angle yet, with respect to calibration curve, different torque curves is corresponding to different floating lock statuss, as tightly can formed floating lock status (4) (not reaching the corner desired value) by the workpiece screw hole.
Can select to enter the standby step when controller 3 detects fault, keep the standby step or start the screwdriver lock function, and export corresponding early warning signal, removing the screwdriver lock-out state needs the user to input password on display screen 4.
Therefore, the present invention has the several functions such as automatic control, data management and monitoring mistake proofing, and efficient, safety, convenience, is that a kind of energy meets the different high-quality numerical control electric screwdrivers of processing needs.
Claims (9)
1. a Current feedback numerical control electric screwdriver, comprise control cabinet and screwdriver, described control cabinet is connected by dismountable control cables with screwdriver, it is characterized in that: described control cabinet comprises casing, described casing is provided with power switch, external power interface, cable interface and display screen, be provided with controller and Switching Power Supply in casing, controller comprises microprocessor, memory, motor drive module and display module, described microprocessor respectively with memory, motor drive module is connected with the display module circuit, motor drive module is connected with the cable interface circuit, display module is connected with the display screen circuit, Switching Power Supply is connected with the external power interface circuit with power switch respectively, described screwdriver comprises cylindrical shell, be provided with connected motor in cylindrical shell, motor reduction gearbox and driving shaft, the cylindrical shell two ends are respectively equipped with connector and criticize and chew, criticize to chew with driving shaft and be connected.
2. Current feedback numerical control electric screwdriver according to claim 1, is characterized in that: in described Switching Power Supply, be provided with filtration module.
3. Current feedback numerical control electric screwdriver according to claim 1, is characterized in that: the position sensor that has at least one detection rotor position in described motor.
4. Current feedback numerical control electric screwdriver according to claim 3, it is characterized in that: described position sensor is Hall element.
5. Current feedback numerical control electric screwdriver according to claim 1, it is characterized in that: described motor is non-carbon brush motor.
6. Current feedback numerical control electric screwdriver according to claim 1, it is characterized in that: described casing is provided with signal output interface, PC communication interface and the usb data interface be connected with controller circuitry.
7. Current feedback numerical control electric screwdriver according to claim 1, is characterized in that: be provided with axial compressive force mechanism outside described cylindrical shell.
8. Current feedback numerical control electric screwdriver according to claim 1, is characterized in that: described controller and signal lamp connection.
9. the control method of a Current feedback numerical control electric screwdriver, chewed screw driving operation for driving by controller to criticize, it is characterized in that: desired value, higher limit and the lower limit of setting moment of torsion and corner according to the processing needs, after starting, controller is detected corner and moment of torsion respectively, and preferentially according to moment of torsion, selects to carry out following steps:
-screw interlock step, manually control or make to criticize to chew to press down the aligning screw cap by the controller that is provided with start-up time, after starting, controller detects moment of torsion by motor current signal, position sensor detects the motor position of rotation and provides the corner current signal to controller, it reached current feed to motor and keep lower-speed state by controller, until controller detects predetermined corner one;
-Quick fastening step, controller carry out current feed and make motor by low speed rotation at a high speed, until controller detects predetermined corner two, make again motor keep high speed rotating, until controller detects predetermined corner three, then controller carries out current feed and makes motor by high speed steering low speed, until controller detects predetermined corner four;
-screw locking step, controller carries out current feed and makes motor keep lower-speed state, until controller detects target torque and target rotation angle, now will send and tighten signal;
-standby step, manually control or make to criticize by controller and chew the disengaging screw cap, and controller will still keep the current feed of specific degrees or stop current feed;
The numerical value of-described predetermined corner one, two, three, four is all proportional with the numerical value of target rotation angle;
-described controller has fault detection capability, for detection of sliding tooth or two kinds of malfunctions of floating lock, sliding dental phenomenon refers to while arriving target rotation angle, thereby controller does not detect target torque yet without tightening signal, floating lock status refers to and arrives target torque and produce while tightening signal, controller does not detect target rotation angle yet, and controller is selected to enter the standby step after detecting fault, kept the standby step or start the screwdriver lock function, and exportable corresponding early warning signal.
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| CN201310389500.4A CN103433882B (en) | 2013-09-02 | 2013-09-02 | A kind of control method of current feedback type numerical control electric screw driver |
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| CN201310389500.4A CN103433882B (en) | 2013-09-02 | 2013-09-02 | A kind of control method of current feedback type numerical control electric screw driver |
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| CN103433882B CN103433882B (en) | 2016-08-10 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103753468A (en) * | 2014-02-13 | 2014-04-30 | 江苏博众汽车部件有限公司 | Screwdriver capable of adjusting pretightening force automatically |
| CN103934673A (en) * | 2014-03-24 | 2014-07-23 | 东莞市聚川装配自动化技术有限公司 | Numerical control electric screw driver based on static torque sensor, and control method |
| CN105269508A (en) * | 2015-11-25 | 2016-01-27 | 柴可 | Method for implementing automatic moment screwdriver |
| CN107020502A (en) * | 2017-05-15 | 2017-08-08 | 杭州巴固机械制造有限公司 | A kind of gas cylinder valve automatic loading and unloading method and device |
| CN109659655A (en) * | 2018-12-29 | 2019-04-19 | 华为机器有限公司 | Tune knife head device, cavity body filter tuner and method |
| CN110576435A (en) * | 2018-06-08 | 2019-12-17 | 鸿富锦精密电子(郑州)有限公司 | Locking control system, locking control method and storage device |
| CN111360741A (en) * | 2020-04-14 | 2020-07-03 | 胡微 | Multifunctional precise numerical control electric screwdriver and use method thereof |
| CN114131553A (en) * | 2021-11-30 | 2022-03-04 | 无锡东海智控软件有限公司 | Motor control device of handheld electric screwdriver |
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| CN114131553A (en) * | 2021-11-30 | 2022-03-04 | 无锡东海智控软件有限公司 | Motor control device of handheld electric screwdriver |
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