CN106249636A - The control system of a kind of bush press and control method thereof - Google Patents
The control system of a kind of bush press and control method thereof Download PDFInfo
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- CN106249636A CN106249636A CN201610248121.7A CN201610248121A CN106249636A CN 106249636 A CN106249636 A CN 106249636A CN 201610248121 A CN201610248121 A CN 201610248121A CN 106249636 A CN106249636 A CN 106249636A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Presses (AREA)
Abstract
The invention discloses control system and the control method of a kind of bush press, including: an ARM control unit；One gas circuit, described ARM it is switched on and off to control on-off control；One ram cylinder, connects described gas circuit, by described gas circuit control described ram cylinder rising and under press；One limit level sensor, is arranged in described ram cylinder, gathers the rising of described ram cylinder and the positional information pressed down and sends into described ARM control unit；Wherein, it is spacing that described ARM control unit judges whether described positional information arrives both positive and negative polarity, controls being switched on and off of described gas circuit accordingly.The bush press control system of the application and method thereof are low in energy consumption, and integrated level is high, can be greatly reduced switch board volume, thus reduce the occupation of land space of press.Using the control system of the application, the extension of press system hardware interface is convenient, and software programming is the most flexible, and system can support several operation systems, and real-time performance is higher, to the response speed of signal faster.
Description
Technical field
The present invention relates to a kind of control system and method, the control system of a kind of lining machine and controlling party thereof
Method.
Background technology
Bushing press-mounting is an important step in automobile chassis assembly technology, uses bush press to realize control at present
Press-fiting of the vehicle chassis components such as arm processed, knuckle, subframe.
Control system is one of core component of bush press, and major function is to control bonding press work, measurement pressure
Power during head work and change in displacement trend, safety detection and protection etc..The control system of the most traditional bush press
System uses PLC as master controller mostly, extends HMI and industrial computer on this basis.Such control system becomes
This is the highest, and real-time performance and dynamic response relatively low.The integration of equipments business being typically different is for Control System Design
Also differing, the degree of modularity is relatively low.
Summary of the invention
It is all exemplary and illustrative for should be appreciated that the generality of more than the disclosure describes with the following detailed description
, and it is intended that the disclosure as claimed in claim provides further explanation.
For the problems referred to above, the invention provides a set of be of relatively low cost, rich interface, the degree of modularity higher
, it is applied to the control system of bush press.Press control system provided by the present invention is minimum system, as needed
Extension, can extend on the basis of the framework of this minimum system.
In order to realize foregoing invention purpose, the invention discloses the control system of a kind of bush press, be applied to a quilt
Pressure workpiece, it is characterised in that including:
One ARM control unit；One gas circuit, described ARM it is switched on and off to control on-off control；One pressure head cylinder
Body, connects described gas circuit, by described gas circuit control described ram cylinder rising and under press；One limit position sensing
Device, is arranged in described ram cylinder, gathers the rising of described ram cylinder and the positional information pressed down and sends into institute
State ARM control unit；Wherein, it is spacing that described ARM control unit judges whether described positional information arrives both positive and negative polarity,
Control being switched on and off of described gas circuit accordingly.
Reasonable, the control system of the bush press that the present invention discloses, it is characterised in that described control system
Farther include: a displacement transducer and a force transducer, for gather respectively described ram cylinder rise and under press
During positional information and described by the pressure information on pressure workpiece, and it is bent to fit to displacement curve and pressure respectively
Line.
Reasonable, the control system of the bush press that the present invention discloses, it is characterised in that described control system
Farther include:
One gas way control switch, receives the signal that described ARM control unit sends, for described gas circuit unlatching and
Turn off；One safety sensor and a safe unit, described safety sensor is for monitoring the described of described control system
The safety information of safe unit feedback, and controlled described ram cylinder by described ARM control unit by described gas circuit
Rising and under press.
Reasonable, the control system of the bush press that the present invention discloses, it is characterised in that described safety sensing
Device includes that a safe grating, described gas way control switch include an electromagnetic valve.
Present invention further teaches the control method of a kind of bush press, it is characterised in that including:
Step one, ARM control system initializes；
Step 2, checks the working environment whether safety of described bush press, if dangerous, interrupts described lining pressure
The work of machine, if safety enters step 3；
Step 3, drives and clamps one by pressure workpiece；
Step 4, it may be judged whether clamp described by pressure workpiece, if clamping; would proceed to step 5, if do not clamp return step
Rapid three；
Step 5, presses under the pressure head of described ARM control system drive ram cylinder body, and is believed the position of described pressure head
Breath passes to described ARM control unit；
Step 6, when in the stroke that described ARM control unit is pressed under described pressure head, if be detected that described pressure head
Arrive negative pole spacing, proceeded to step 7, if not up to negative pole is spacing, then proceed to step 5；
Step 7, controls described ram cylinder resilience and rises；
Step 8, it is judged that it is spacing whether described pressure head arrives positive pole, if not arriving, proceeds to step 7, turns if arriving
Enter step 9；
Step 9, terminates gathering the displacement data of described pressure head and by the stress data of pressure workpiece, and fits to displacement
Curve and pressure curve；
Step 10, unclamps described by pressure workpiece, goes to next station.
Reasonable, that the present invention the discloses control method of bush press, it is characterised in that described step 5 it
After, farther include: step May Day, monitor in real time respectively described pressure head be pressed in described by the stress on pressure workpiece and
Described movable press head position two analog signals.
Reasonable, the control method of the bush press that the present invention discloses, it is characterised in that described step 5 is entered
One step includes, described ARM control system trigger an output drive signal give described electromagnetic valve, by control described electricity
The break-make of magnet valve realize pressure head rising and under press.
Reasonable, the control method of the bush press that the present invention discloses, it is characterised in that in step 2,
Described ARM control system sends instructions to a safe grating by a RS232 interface, inquires about presently described safety light
The state of grid, when described safe grating triggers, feedback states instructs to described ARM control system described to interrupt
The work of bush press, enters malfunction.
The bush press control system of the application and method thereof are low in energy consumption, and integrated level is high, can be greatly reduced switch board
Volume, thus reduce the occupation of land space of press.It addition, use the control system of the application, press system hardware connects
Mouth extension is convenient, and software programming is the most flexible, and system can support several operation systems, and real-time performance is higher,
To the response speed of signal faster.
Accompanying drawing explanation
Below, referring to the drawings, for those skilled in the art, from retouching in detail the inventive method
In stating, the above and other objects, features and advantages of the present invention will be apparent to.
Fig. 1 is the composition frame chart of the bush press control system of the present invention；
Fig. 2 is the control flow chart of the bush press of the present invention.
Reference
1---ARM control unit
2---gas way control switch
3---gas circuit
4---ram cylinder
5---safety sensor
6---displacement transducer
7---force transducer
8---limit level sensor
9---safe unit
10---display unit
Detailed description of the invention
Describe with detailed reference to accompanying drawing now and embodiment of the disclosure.Being preferable to carry out with detailed reference to the disclosure now
Example, its example is shown in the drawings.In the case of any possible, identical labelling will be used in all of the figs
Represent same or analogous part.Although additionally, the term used in the disclosure is from public term
Middle selection, but some terms mentioned in present disclosure specification are probably applicant and come by his or her judgement
Select, the explanation in the relevant portion of description herein of its detailed meanings.Additionally, require not only by being made
Actual terms, and be also to the meaning by each term is contained and understand the disclosure.
Fig. 1 show the control system composition of the bush press of the present invention.
This control system includes ARM control unit 1, gas way control switch 2, gas circuit 3, ram cylinder 4, safety
Sensor 5, displacement transducer 6, force transducer 7, limit level sensor 8, safe unit 9 and display unit
10。
Wherein ARM control unit 1 controls to enter the gas circuit of ram cylinder 4 by gas way control switch 2 such as electromagnetic valves
3 be turned on and off, thus realize the pressure of the ram cylinder 3 to bush press or lift, it is arranged on pressure head cylinder
Pressure head bottom body 3 is implemented to press-fit operation to by pressure workpiece.
It is arranged on the safe unit 9 of bush press periphery to be combined with safety sensor 5 and play protective action, once goes out
Existing hidden danger, ARM control unit 1 brakes ram cylinder 4, and in this preferred embodiment, safety sensor 5 can be adopted
Use safe grating.
Additionally, this control system also includes displacement transducer 6 and force transducer 7, respectively in order to monitor ram cylinder
The pressure head of 4 is displacement and the change of active force in whole pressing process, and provides one continuously at display unit 10
Curve, it is achieved monitor in real time.
Below in conjunction with the composition of this control system, and the flow chart shown in Fig. 2, describe the control of the present invention in detail
The workflow of system.
Step s1, system initialization, including System self-test, register configuration etc. is some；
Step s2, starts control system, the first output signal of the safe grating that detection safety sensor 5 obtains
The most normal, once there is triggering during press-fiting safe grating, ARM control unit 1 can interrupt present procedure
Run, stop compressor operation, it is ensured that safety；
Step s3, if judging that grating signal is normal in step 2, control unit 1 triggers 24V output and drives
The electromagnetic valve of clamp cylinder, after electromagnetic valve is opened, clip handles workpiece, when ARM receives the magnetic of clamp cylinder
During switching signal, it is judged that fixture is in clamped condition；
Step s4, it is judged that whether fixture clamps by pressure workpiece, if clamping, proceeds to step 5, if do not clamped,
Return step 3；
Step s5, once clamps workpiece, and ARM control unit output control signal opens the electromagnetic valve of ram cylinder,
After electromagnetic valve is opened, the gas circuit air inlet open being connected with ram cylinder, working gas enters ram cylinder, pressure head
Under press, the positional information of pressure head is passed to ARM control unit by the limit level sensor being arranged on pressure head end；
Step s6, presses in stroke under the pressure head of step 5, by force transducer and displacement transducer prison the most in real time
Pressure-measuring head is pressed in by the power on pressure workpiece and movable press head position two analog signals；
Step s7, presses in stroke, if detectable limit level sensor level is sent out under ARM control unit is at pressure head
During raw saltus step, represent that pressure head has arrived negative pole spacing, proceed to step s8, if being not detected by limit level sensor electricity
Flat saltus step, then proceed to step s6, and pressure head is pressed under continuing downwards；
Step s8, is driven and the work of the electromagnetic valve controlling ram cylinder gas circuit by control unit, by this electromagnetism
Valve controls the air inlet of gas circuit and turns off, and opens the gas outlet of gas circuit, and now resilience is risen by ram cylinder；
Step s9, judges in resilience uphill process whether limit level sensor arrives positive pole spacing, i.e. current pressure head
The most rising at the positive limit, if do not arrived, then having proceeded to step s8, continued resilience and rise；
Step s10, if it is determined that limit level sensor arrival positive pole is spacing, then ARM control unit terminates displacement biography
Sensor and the data acquisition of force transducer, preserve data matched curve that early stage gathers；
Step s11, ARM control unit closedown clamp cylinder solenoid-driven signal, fixture unclamps, by pressure workpiece
Go to next station.
The control system of the present invention is embedded control system based on arm processor exploitation.ARM is utilized to enrich
Interface realizes the electrical hardware interface of bush press.The control program of press operates on arm processor.
Control system operation principle is that ARM is as Master control chip, at ARM peripheral expansion interface circuit, press
Control program operates on ARM sheet.
In sum, workflow is: after pressing start button, and ARM receives button commands, triggers 24V
Output drives fixture to the electromagnetic valve of cylinder, and after electromagnetic valve is opened, clip handles workpiece, when ARM receives fixture
During the magnetic switch signal of cylinder, it is judged that fixture is in clamped condition.Now, ARM exports 24V signal drive ram
The electromagnetic valve of cylinder is opened, and bonding press proceeds by depression, when press is depressed into negative pole extreme position, negative
Limit sensor output signal to ARM, ARM detect negative pole limit sensor signal after, by the electromagnetism of pressure head cylinder
Valve 24V exports disconnection, and pressure head starts to return, until running to positive extreme position, ARM detects that the positive limit senses
After device signal, ARM disconnects the 24V signal of clamp cylinder, unclamps fixture.Magnetic switch pine when ARM clamp cylinder
After ON signal, it is judged that press once press-fits work to be completed.
Whole press-fit during, power and displacement transducer signal are sampled by ARM in real time, by program matching
Power and the curve of shift value, output is on the lcd screen.When triggering safe grating during press-fiting, ARM meeting
Interrupt present procedure to run, stop compressor operation, it is ensured that safety.
The specific descriptions of each interface during ARM in the application is controlled:
1. force sensor signals acquisition interface.Electrical characteristic: DC simulation-10V～+10V.Function: compressor operation
Time pressure is monitored in real time.Implementation method: force sensor signals is sampled, and do data process, for
Power displacement curve provides basic data.(idiographic flow: force transducer exports analogue signal-> control by amplifier
What analog quantity was converted into digital signal-> this 16 position digital signal reaction of 16 by the A/D module of system is exactly to work as
The value of the front pressure-> SRAM-> ARM of this 16 position digital signal writing system is read from SRAM static memory
The data of each power sampled point are fitted to curve and show on the lcd screen by power sampled data-> ARM)
2. displacement transducer signal acquisition interface.Electrical characteristic: simulation 4mA～20mA and RS422 increment type coding
Device differential signal.Function: during compressor operation, the stroke to pressure head monitors in real time.Implementation method: displacement is passed
Sensor signal is acquired, and does data process, provides basic data for power displacement curve.(idiographic flow: when
When signal is analogue signal, flow process is ibid.When signal is RS422 incremental encoder differential signal: pressure head position
Shifting changes, displacement transducer output pulse signal-> turn single-ended chip by difference in control system, by difference
Signal changes into standard TTL signal to ARM-> ARM receives this pulse signal rising edge and trailing edge does frequency multiplication counting,
Relative variation-> the ARM of current displacement can be calculated by displacement variable curve matching in time by counting
In LCD screen)
3. digital input interface.Electrical characteristic: 5V (TTL) and 24V.Function: cylinder pressure and fixture limit position sensing
Device signals collecting.(when sensor level changes, ARM detects the saltus step trigger of sensor level
Interrupting, ARM provides digital output signal and drives the electromagnetic valve state of press or clamp cylinder to change)
4. digital output interface.Electrical characteristic: 5V (TTL) and 24V.Function: cylinder pressure solenoid-driven signal,
Realize pressure head by the break-make controlling electromagnetic valve extrude and retract.(ARM triggers 24V output drive signal to electromagnetism
Valve, realizes pressure head by the break-make controlling electromagnetic valve and press-fits work)
5. standard RS232 interface (ARM is the most integrated).Function: expansion interface (such as safe grating etc.).(ARM
Send instructions to safe grating by RS232 interface, inquire about current safety grating state.When safe grating triggers,
Feedback states instructs after receiving safety failure information to ARM, ARM and interrupts present procedure, stops compressor operation, enters
Enter malfunction)
6. standard RS485 interface (ARM is the most integrated).Function: expansion interface.
7. standard EHTERNET interface (ARM is the most integrated).Function: expansion interface.(outside configurable printer etc.
If)
8.LCD special purpose interface.Function: external-connection displayer, shows power displacement curve.
The bush press control system integration degree using above design is high, able to programme.The application has only to one piece of ARM
Industry control board can realize, switch board and a large amount of low-voltage electrical element can be saved, cost is greatly reduced.
The bush press control system of the application is low in energy consumption, integrated level high (all control functions be integrated in one piece based on
On ARM chip control circuit plate), switch board volume can be greatly reduced, thus reduce the occupation of land space of press.
It addition, use the control system of the application, the extension of press system hardware interface is convenient, and software programming is the most flexible,
System can support several operation systems (Linux, Android, WinCE etc.), and real-time performance is higher, right
The response speed of signal is faster.For stand-alone type press system, the control mode of application ARM is the most reasonable, cost
Lower, and may be designed to modular control system, (control system hardware is not to can be applicable to different press system
Become, software programmable).PLC is used to control for large-scale production line the most reasonable and convenient.
The bush press control system interface of the application enriches with functional configuration, can replace lining traditional on market
Press control system, it is achieved the control of press is applied, and the more traditional PLC of cost control at least to reduce by 50% with
On.
The description to preferred embodiment provided above, so that any technical staff in this area can use or utilize
The present invention.Various amendments to these embodiments are evident for personnel skilled in the art, can be here
Described total principle is applied to other embodiments and does not use creativeness.Thus, the present invention is not limited to institute here
The embodiment shown, and should be according to the widest range meeting teachings disclosed herein and new feature.
Claims (8)
1. a control system for bush press, is applied to one by pressure workpiece, it is characterised in that including:
One ARM control unit；
One gas circuit, described ARM it is switched on and off to control on-off control；
One ram cylinder, connects described gas circuit, by described gas circuit control described ram cylinder rising and under press；
One limit level sensor, is arranged in described ram cylinder, gathers the rising of described ram cylinder and presses down
Positional information also sends into described ARM control unit；
Wherein, it is spacing that described ARM control unit judges whether described positional information arrives both positive and negative polarity, controls institute accordingly
State being switched on and off of gas circuit.
The control system of bush press the most according to claim 1, it is characterised in that described control system
Farther include:
One displacement transducer and a force transducer, during gathering the rising of described ram cylinder respectively and pressing down
Positional information and described by the pressure information on pressure workpiece, and fits to displacement curve and pressure curve respectively.
The control system of bush press the most according to claim 1 and 2, it is characterised in that described control
System farther includes:
One gas way control switch, receives the signal that described ARM control unit sends, for described gas circuit unlatching and
Turn off；
One safety sensor and a safe unit, described safety sensor is for monitoring the described peace of described control system
The safety information of full unit feedback, and controlled described ram cylinder by described ARM control unit by described gas circuit
Rise and under press.
The control system of bush press the most according to claim 3, it is characterised in that
Described safety sensor includes that a safe grating, described gas way control switch include an electromagnetic valve.
5. the control method of a bush press, it is characterised in that including:
Step one, ARM control system initializes；
Step 2, checks the working environment whether safety of described bush press, if dangerous, interrupts described lining pressure
The work of machine, if safety enters step 3；
Step 3, drives and clamps one by pressure workpiece；
Step 4, it may be judged whether clamp described by pressure workpiece, if clamping; would proceed to step 5, if do not clamp return step
Rapid three；
Step 5, presses under the pressure head of described ARM control system drive ram cylinder body, and is believed the position of described pressure head
Breath passes to described ARM control unit；
Step 6, when in the stroke that described ARM control unit is pressed under described pressure head, if be detected that described pressure head
Arrive negative pole spacing, proceeded to step 7, if not up to negative pole is spacing, then proceed to step 5；
Step 7, controls described ram cylinder resilience and rises；
Step 8, it is judged that it is spacing whether described pressure head arrives positive pole, if not arriving, proceeds to step 7, turns if arriving
Enter step 9；
Step 9, terminates gathering the displacement data of described pressure head and by the stress data of pressure workpiece, and fits to displacement
Curve and pressure curve；
Step 10, unclamps described by pressure workpiece, goes to next station.
The control method of bush press the most according to claim 5, it is characterised in that described step 5 it
After, farther include:
Step May Day, monitor described pressure head respectively in real time and be pressed in described by the stress on pressure workpiece and described movable press head
Position two analog signals.
The control method of bush press the most according to claim 6, it is characterised in that described step 5 is entered
One step includes, described ARM control system trigger an output drive signal give described electromagnetic valve, by control described electricity
The break-make of magnet valve realize pressure head rising and under press.
The control method of bush press the most according to claim 7, it is characterised in that
In step 2, described ARM control system sends instructions to a safe grating by a RS232 interface, looks into
Asking the state of presently described safe grating, when described safe grating triggers, feedback states instructs to be controlled to described ARM
System processed, to interrupt the work of described bush press, enters malfunction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610248121.7A CN106249636A (en) | 2016-04-20 | 2016-04-20 | The control system of a kind of bush press and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610248121.7A CN106249636A (en) | 2016-04-20 | 2016-04-20 | The control system of a kind of bush press and control method thereof |
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| CN106249636A true CN106249636A (en) | 2016-12-21 |
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| CN201610248121.7A Pending CN106249636A (en) | 2016-04-20 | 2016-04-20 | The control system of a kind of bush press and control method thereof |
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Cited By (1)
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|---|---|---|---|---|
| CN108959762A (en) * | 2018-06-29 | 2018-12-07 | 江铃汽车股份有限公司 | A kind of efficient bushing approximating method |
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Application publication date: 20161221 |
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| RJ01 | Rejection of invention patent application after publication |