CN102759940A - Full-function type bolt screwing shaft controller - Google Patents

Abstract

The invention discloses a full-function type bolt screwing shaft controller, which comprises an STC controller, and a torque signal detection unit, an execution switch, a drive execution unit, an encoder input unit, a communication unit and a display unit which are connected with the STC controller, wherein the STC controller is used for carrying out input detection and output control on a signal and processing data; the torque signal detection unit is used for detecting the torque borne by a screwing shaft; the execution switch is used for sending a command signal of executing screwing to the STC controller; the drive execution unit is used for controlling a servo motor drive screwing shaft to complete the screwing process by adopting the command; the encoder input unit is used for calculating a screwing angle of the screwing shaft; the communication unit is used for realizing the data transmission between the STC controller and an upper control unit; and the display unit is used for displaying the screwing torque, the screwing angle and the screwing state of the bolt screwing shaft. The full-function type bolt screwing shaft controller realizes the requirement of real-time control for the screwing torque and the screwing angle of a bolt, and is improved in stability, reliability, accuracy and assembly quality during bolt screwing.

Description

The full function bolt is tightened axis controller

Technical field

The present invention relates to the automatic fastening field of auto manufacturing's bolt, particularly a kind of full function bolt is tightened axis controller.

Background technology

The electronic machine for setting multi-rod screw that use at present domestic automobile manufacturing industry scene has many types; But the electronic machine for setting multi-rod screw of many manufacturer production; The precision of its screw-down torque and angle does not often reach production requirement, even bolt is tightened fracture, and performance is very unstable.Analyzing its main cause is: by producer adopt industrial control computer to add various data collecting plate cards to form the control core, the employing programmable controller (PLC) that has is controlled, or their Combination Control.Because in these several kinds of control methods; The various data acquisition card applications of industrial control computer or the each several part coordination performance difference and the Whole Response speed of PLC program are slow; So can't satisfy control system to the bolt screw-down torque with tighten the requirement of angle real-time, cause the influence and the destruction of bolt to tightening precision, it is thus clear that; The performance of electronic machine for setting multi-rod screw and precision thereof mainly are the processing mode and the controller system structure Design of bolt being tightened the control system real-time.

Summary of the invention

In order to realize that control system is to bolt screw-down torque and the requirement of tightening the angle real-time; Stability, reliability and precision when the raising bolt is tightened; Thoroughly solve accuracy, the consistance of moment in the bolted; Improve the assembly quality of web member, the invention provides a kind of full function bolt and tighten axis controller.

Said technical scheme is following:

A kind of full function bolt is tightened axis controller, and said bolt is tightened axis controller and single bolt and tightened axle and be connected, and it comprises:

The STC controller, the input that is used for signal detects, output is controlled and the processing of data;

The torque signal detecting unit is used to detect and when bolt is tightened the moment of torsion that axle is born;

Carry out switch, be used for sending the command signal that action is tightened in execution to said STC controller;

Drives execution element receives the signal of said STC controller, and the instruction control servomotor drives and tightens axle and accomplish a rundown process;

The scrambler input block, it is connected with said STC controller, is used to calculate the angle of tightening of tightening axle;

Communication unit is used for the data transmission between said STC controller and the upper control module;

Display unit is connected with said STC controller, is used to show that bolt tightens screw-down torque, angle and the tight condition of axle.

Further, said bolt is tightened axis controller and is also comprised watchdog circuit, is used for the operation of said STC controller is kept watch on.

Described display unit comprises charactron display circuit, tight condition pilot lamp output circuit and torque signal regulating circuit;

Described charactron display circuit is used to show that bolt tightens screw-down torque, the angle of axle;

Described tight condition pilot lamp output circuit is used to show the tight condition of tightening axle, and described tight condition comprises display power supply, just commentaries on classics, inverted status and tighten that result's moment of torsion is high, moment of torsion is qualified, moment of torsion is low, angle is high, angle is qualified and angle is low;

The torque signal regulator is used for the zero point drift adjustment and the gain adjustment of said torque signal detection signal.

Described drives execution element comprises servo-driver, D/A converting circuit and latch; Said latch receives the voltage signal of said STC controller; And after the D/A converting circuit conversion, exporting said servo-driver to, the control servomotor is carried out screw-down torque.

Described communication unit comprises a RS-232 and a RS-485 Communications Control Interface, is used for realizing data transmission with upper control module.

The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is:

(1) the present invention is through automation control system modularization integration mode, and automaticity is high, and is easy and simple to handle, and reliability is high, and modular construction is convenient to Fast Installation, is suitable for the extensive operation and maintenance of automobile assembly line;

(2) the present invention carries out self contained function through each bolt being tightened controller of axle preparation to the single axle of tightening, and has thoroughly overcome ubiquitous false moment of torsion phenomenon in the bolted; Simultaneously, tighten the demonstration of a screw-down torque and angle, just can understand the moment of torsion that each tightens axle very intuitively through each; Angle is qualified, defective; States such as fault solve accuracy, the consistance of moment in the bolted, have improved the assembly quality of web member greatly;

(3) controller is provided with communication unit, can form the multiaxis Control Network easily, through disposing the I/O IO interface; Can be connected with field control equipment such as PLC; The torque signal of wide region detects simultaneously, can control the axle of tightening of different model, and has the repertoire that axle is tightened in control; Have the flexibility characteristics, can adapt to many kinds.

Description of drawings

In order to be illustrated more clearly in the technical scheme in the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the core control circuit structured flowchart that full function bolt provided by the present invention is tightened axis controller;

Fig. 2 is the Facad structure that full function bolt provided by the present invention is tightened axis controller;

Fig. 3 is the side structure that full function bolt provided by the present invention is tightened axis controller;

Fig. 4 is the structure that full function bolt provided by the present invention is tightened axis controller.

Among the figure:

1-front end Presentation Function panel; 2-controller display screen; 3-controller tight condition pilot lamp; 4-torque signal regulator;

The 5-mounting hole; The 6-heat sink; 7-rear end control interface function panel; 8-torque sensor signal interface; 9-controller power source interface; 10-switching value input/output interface; 11-RS-232 and RS-485 communication interface; 12-servomotor control interface.

Embodiment

For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.

The invention provides a kind of full function bolt and tighten axis controller, each bolt is wherein tightened axle and is all connected a bolt and tighten axis controller, and its structure is as shown in Figure 1, and it comprises:

The STC controller, the input that is used for signal detects, output is controlled and the processing of data;

The torque signal detecting unit is used to detect and when bolt is tightened the moment of torsion that axle is born;

Carry out switch, be used for sending the command signal that action is tightened in execution to said STC controller;

Drives execution element receives the signal of said STC controller, and the instruction control servomotor drives and tightens axle and accomplish a rundown process;

The scrambler input block, it is connected with said STC controller, is used to calculate the angle of tightening of tightening axle;

Communication unit is used for the data transmission between said STC controller and the upper control module;

Display unit is connected with said STC controller, is used to show that bolt tightens screw-down torque, angle and the tight condition of axle;

Watchdog circuit is used for the operation of said STC controller is kept watch on.

Wherein display unit comprises charactron display circuit, tight condition pilot lamp output circuit and torque signal regulating circuit, respectivelycontroller display screen 2, controller tightcondition pilot lamp 3 and the torque signal regulator 4 in the corresponding diagram 2;

The charactron display circuit is used to show that bolt tightens screw-down torque, the angle of axle; Bolt is tightened the screw-down torque and the angle display unit of axle, can show the moment of torsion and the angle of rundown process in real time, tightens to show moment of torsion and the angle that this tightens the result when finishing; When breaking down; Can show failure code, example: like data transmission fault, reveal codes E01 then; Sensor is reported to the police, then reveal codes E03; Servo-drive is reported to the police, then reveal codes E04.

Tight condition pilot lamp output circuit wherein is used to show the tight condition of tightening axle; Tight condition comprises display power supply, just commentaries on classics, inverted status and tighten that result's moment of torsion is high, moment of torsion is qualified, moment of torsion is low, angle is high, angle is qualified and angle is low, as shown in Figure 2;

The torque signal regulator is used for the zero point drift adjustment and the gain adjustment of said torque signal detection signal, and is as shown in Figure 2.

Drives execution element comprises servo-driver, D/A converting circuit and latch, and latch receives the voltage signal of STC controller, and after the D/A converting circuit conversion, exports servo-driver to, and the control servomotor is carried out screw-down torque.

Communication unit comprises a RS-232 and a RS-485 Communications Control Interface, is used for realizing data transmission with upper control module.

Full function bolt provided by the present invention is tightened axis controller and is adopted the modular construction design, and each is tightened axis controller and can independently control a cover bolt and tighten axle, its one-piece construction such as Fig. 2, Fig. 3 and shown in Figure 4.Mainly contain front endPresentation Function panel 1 and rear end controlinterface function panel 7, be furnished with heat sink 6 all around, and be furnished with four installing and locatingholes 5, form the panel type mounting structure that bolt is tightened axis controller.

The controller heat sink is that the heat radiator 6 of aluminium section bar matter is formed, and is used for the heat radiation (see figure 3) of chip.

The interface control function district of controlinterface function panel 7 is by torque sensor signal interface 8 in the rear end, controller power source interface 9, and RS-232 and RS-485 communication interface 11, servomotor control interface 12, switching value input/output interface 10 is formed (see figure 4)s.

The full function bolt is tightened the principle of work of axis controller:

The full function bolt tightens that the core circuit plate structure of axis controller is as shown in Figure 1, and it is its key control unit with the STC controller, and the input of being responsible for various signals detects, the Processing tasks of output control and data.Change when the switching value that has light-coupled isolation just receives, after the counter-rotating, startup, stop signal, the control of beginning rundown process; In rundown process, the A/D analog to digital conversion circuit receives the input voltage (10v voltage arrives+10v voltage) of torque signal detecting unit; Simultaneously, the scrambler input block that the servo-driver frequency division is handled inputs to the counter of STC controller through optocoupler, is used for calculating angle value; D/A converting circuit is used for output voltage signal, and the voltage signal of output instructs to servo-driver, and servo-driver instruction AC servo motor drive machinery is tightened axle and accomplished rundown process; Have the outside Presentation Function that LED light output and two row's group of four figures pipes show, the moment of torsion that LED light is used for display power supply, just changes, reverses and tightens the result is high, moment of torsion is qualified, moment of torsion is low, angle is high, angle is qualified, angle is low; Each communication unit of tightening axis controller all has a RS-232 and a RS-485 Communications Control Interface; Be used for accepting various technological parameters of tightening and the controlled variable signal that the external control computing machine transmits; Accomplish the exercises process according to these parameters, and send these state procedure values to the external control computing machine through it.There is watchdog circuit to be responsible for supervision in the whole procedure operational process, prevents the situation of deadlock controller.

The invention described above embodiment sequence number is not represented the quality of embodiment just to description.

The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. a full function bolt is tightened axis controller, it is characterized in that, said bolt is tightened axis controller and single bolt and tightened axle and be connected, and it comprises:

The STC controller, the input that is used for signal detects, output is controlled and the processing of data;

The torque signal detecting unit is used to detect and when bolt is tightened the moment of torsion that axle is born;

Carry out switch, be used for sending the command signal that action is tightened in execution to said STC controller;

Drives execution element receives the signal of said STC controller, and the instruction control servomotor drives and tightens axle and accomplish a rundown process;

The scrambler input block, it is connected with said STC controller, is used to calculate the angle of tightening of tightening axle;

Communication unit is used for the data transmission between said STC controller and the upper control module;

Display unit is connected with said STC controller, is used to show that bolt tightens screw-down torque, angle and the tight condition of axle.

2. full function bolt according to claim 1 is tightened axis controller, it is characterized in that, also comprises:

Watchdog circuit is used for the operation of said STC controller is kept watch on.

3. full function bolt according to claim 1 is tightened axis controller, it is characterized in that,

Described display unit comprises charactron display circuit, tight condition pilot lamp output circuit and torque signal regulating circuit;

Described charactron display circuit is used to show that bolt tightens screw-down torque, the angle of axle;

Described tight condition pilot lamp output circuit is used to show the tight condition of tightening axle, and described tight condition comprises display power supply, just commentaries on classics, inverted status and tighten that result's moment of torsion is high, moment of torsion is qualified, moment of torsion is low, angle is high, angle is qualified and angle is low;

The torque signal regulator is used for the zero point drift adjustment and the gain adjustment of said torque signal detection signal.

4. tighten axis controller according to the arbitrary described full function bolt of claim 1-3, it is characterized in that,

Described drives execution element comprises servo-driver, D/A converting circuit and latch; Said latch receives the voltage signal of said STC controller; And after the D/A converting circuit conversion, exporting said servo-driver to, the control servomotor is carried out screw-down torque.

5. full function bolt according to claim 4 is tightened axis controller, it is characterized in that,

Described communication unit comprises a RS-232 and a RS-485 Communications Control Interface, is used for realizing data transmission with upper control module.

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