CN104400218A - Follow-up system - Google Patents
Follow-up system Download PDFInfo
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- CN104400218A CN104400218A CN201410708589.0A CN201410708589A CN104400218A CN 104400218 A CN104400218 A CN 104400218A CN 201410708589 A CN201410708589 A CN 201410708589A CN 104400218 A CN104400218 A CN 104400218A
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- preamplifier
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- 239000000919 ceramic Substances 0.000 claims description 21
- 239000000523 sample Substances 0.000 claims description 7
- 230000009970 fire resistant effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003698 laser cutting Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/046—Automatically focusing the laser beam
- B23K26/048—Automatically focusing the laser beam by controlling the distance between laser head and workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a follow-up system. The follow-up system comprises a follow-up sensor, a preamplifier, a controller, a high-frequency cable and a control cable, wherein the follow-up sensor is connected with the preamplifier by use of a high-frequency cable; the preamplifier is connected with the controller by use of a control cable. The follow-up system has the advantages that a non-contact capacitive sensor is adopted, the sensor and a cutting head are integrated, and the preamplifier and the controller are adopted to self-adaptive position closed-loop control on the focal position of laser, and therefore, high-quality and high-stability cutting machining effect can be achieved.
Description
Technical field
The present invention relates to a kind of servomechanism, particularly a kind of condenser type servomechanism, belongs to fields of numeric control technique.
Background technology
Servo antrol is also referred to as clearance control, refer in digital control laser process, control laser cutting head and surface of the work keep constant distance, that is along with the fluctuation of surface of the work, laser cutting head also wants real-time adjustment position, and the constant distance of both guarantees is constant.So can ensure the invariable of defocusing amount in whole process, thus guarantee joint-cutting, cut the constant of fineness.And divide contact and contactless two kinds for the measurement of laser cutting head and surface of the work distance.The servo-actuated surface smooth finish owing to can have influence on cut material of contact, is generally used for die cutting plate, carbon steel etc. to the less demanding diced system of material surface; Contactless servo-actuated, be widely used in the fields such as Metal Cutting.Contactlessly servo-actuatedly also divide some classes, mainly contain electromagnetic type, photo-electric, condenser type etc.The main product of existing market servomechanism all adopts condenser type.
Servomechanism greatest problem is in the market reliable and stable not, is very easily disturbed, thus affects its effect used.
Summary of the invention
For solving the problem that prior art stable performance is poor, complex structure, cost performance are low, the invention provides a kind of servomechanism, the technical solution adopted for the present invention to solve the technical problems is: comprise with dynamic sensor, preamplifier, controller, high frequency cable and control cables; Describedly to be connected with described preamplifier by high frequency cable with dynamic sensor; Described preamplifier is connected with described controller by control cables.
Further, describedly sensor body, ceramic body, locking nut, laser nozzle and BNC connector is comprised with dynamic sensor; The upper surface of described sensor body is connected with cutting head by screw thread, the lower surface of sensor body connects with the upper surface of ceramic body by the position of locating hole, ceramic body is fixed in sensor body by screw thread by locking nut, laser nozzle is connected by the lower surface of screw thread with described ceramic body, BNC connector is fixed by screws in the side of described sensor body, outer side joint high frequency cable, inner side is connected with spring probe by fire resistant electric wire, and spring probe contacts with the electrode of ceramic body.
Further, described preamplifier comprises discharge circuit, first input end, the second input, the first output, the second output, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, triode, electric capacity, diode and power supply; Described power supply first end connects described second output; The first end of described first resistance connects the second end of described power supply; The first end of described second resistance connects the second end of described first resistance; The first end of described 3rd resistance connects the second end of described second resistance; Second end of described 3rd resistance connects described second input; The first end of described 4th resistance connects described first input end; The first end of described discharge circuit connects the second end of described 4th resistance; Second end of described discharge circuit connects the 3rd end of described second resistance; The first end of described 5th resistance connects the second end of described 4th resistance; The first end of described 6th resistance connects the 3rd end of described discharge circuit; The first end of described triode connects the second end of described 6th resistance; The first end of described 7th resistance connects the second end of described triode; Second end of described 7th resistance connects the second end of described power supply; Second end of the 5th resistance described in the three-terminal link of described 7th resistance; The first end of described diode connects the 3rd end of described triode; Second end of described diode connects described first output; The first end of described electric capacity connects the 3rd end of described triode; Second end of described electric capacity connects described second output.
Further, described controller is PLC; Described controller comprises the first pin, the second pin, three-prong, the 4th pin, the 5th pin, the 6th pin, the 7th pin, the 8th pin, the 9th pin, the tenth pin, the 11 pin; Described first pin and the second pin are 232 interfaces; Described three-prong and the 4th pin are that motor drives interface; Described 5th pin is warning output interface; Described 6th pin is Z axis upper limit input; Described 7th pin is Z axis lower limit input; Described 8th pin is power input; Described 9th pin is earth terminal; Described tenth pin is alarm signal end; Described 11 pin is the first gap output; Described 12 pin is the second gap output.
Further, described laser nozzle is connected with described ceramic body by screw thread.
Further, described ceramic body comprises main-body electrode, wiring hole, the first locating dowel and the second locating dowel; Described main-body electrode is provided with described wiring hole, described first locating dowel and described second locating dowel; Described wiring hole is between described first locating dowel and the second locating dowel.
Further, the main-body electrode of described ceramic body is connected with BNC connector through fire resistant electric wire by spring probe.
Further, the input voltage of described preamplifier is 0-24VDC, and output current is 0-20mA.
Benefit of the present invention is: adopt contactless type capacitance sensor, sensor and cutting head integrated design, by preamplifier and controller, realize the focal position adaptive location closed-loop control of laser, and then reach the cutting processing effect of high-quality, high stability.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of servomechanism of the present invention;
Fig. 2 is the servo-actuated sensor construction schematic diagram of the present invention;
Fig. 3 is laser nozzle structural representation of the present invention;
Fig. 4 is ceramic body structural representation of the present invention;
Fig. 5 is spring probe structure schematic diagram of the present invention;
Fig. 6 is preamplifier circuit schematic diagram of the present invention;
Fig. 7 is the present invention is controller schematic diagram;
Fig. 8 is the flow chart of controller PLC program of the present invention.
Detailed description of the invention
When considered in conjunction with the accompanying drawings, by referring to detailed description below, more completely can understand the present invention better and easily learn wherein many adjoint advantages, but accompanying drawing described herein is used to provide a further understanding of the present invention, form a part of the present invention, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention, as schemed wherein:
Obviously, the many modifications and variations that those skilled in the art do based on aim of the present invention belong to protection scope of the present invention.
Embodiment 1: as shown in Figures 1 to 7, the present embodiment provides a kind of servomechanism, comprises with dynamic sensor 1, preamplifier 2, controller 3, high frequency cable 4 and control cables 5; Be connected with preamplifier 2 by high frequency cable 4 with dynamic sensor 1; Preamplifier 2 is connected with controller 3 by control cables 5.
Sensor body 10, ceramic body 11, locking nut 12, laser nozzle 13 and BNC connector 14 is comprised with dynamic sensor 1; BNC connector 14 connecting sensor body 10 side; The lower surface of the upper surface connecting sensor body 10 of ceramic body 11, ceramic body 11 comprises main-body electrode 111, wiring hole 112, first locating dowel 113 and the second locating dowel 114; Wiring hole 112 is between the first locating dowel 113 and the second locating dowel 114, and main-body electrode 111 is connected 14 through fire resistant electric wire with BNC connector by spring probe 15 and connects; Ceramic body 11 is fixed in sensor body 10 by screw thread by locking nut 12; Laser nozzle 13 is threaded connection the upper surface of ceramic body 11.
Preamplifier 2 comprises discharge circuit 20, first input end 21, second input 22, first output 23, second output 24, first resistance 25, second resistance 26, the 3rd resistance 27, the 4th resistance 28, the 5th resistance 29, the 6th resistance 211, the 7th resistance 212, triode 213, electric capacity 214, diode 215 and power supply 216; Power supply 216 first end connects the second output 24; The first end of the first resistance 25 connects the second end of power supply 216; The first end of the second resistance 26 connects the second end of the first resistance 25; The first end of the 3rd resistance 27 connects the second end of the second resistance 26; Second end of the 3rd resistance 27 connects the second input 22; The first end of the 4th resistance 28 connects first input end 21; The first end of discharge circuit 20 connects the second end of the 4th resistance 28; Second end of discharge circuit 20 connects the 3rd end of the second resistance 26; The first end of the 5th resistance 29 connects the second end of the 4th resistance 28; The first end of the 6th resistance 211 connects the 3rd end of discharge circuit 20; The first end of triode 213 connects the second end of the 6th resistance 211; Second end of the first end connecting triode 213 of the 7th resistance 212; Second end of the 7th resistance 212 connects the second end of power supply 216; Second end of three-terminal link the 5th resistance 29 of the 7th resistance 212; 3rd end of the first end connecting triode 213 of diode 215; Second end of diode 215 connects the first output 23; 3rd end of the first end connecting triode 213 of electric capacity 214; Second end of electric capacity 214 connects the second output 24.
Controller 3 is PLC; Controller 3 comprises the first pin 31, second pin 32, three-prong 33, the 4th pin 34, the 5th pin 35, the 6th pin 36, the 7th pin 37, the 8th pin 38, the 9th pin 39, the tenth pin the 311, the 11 pin the 312, the 12 pin 313; First pin 31 and the second pin 32 are 232 interfaces; Three-prong 33 and the 4th pin 34 are motor driving interface; 5th pin 35 is warning output interface; 6th pin 36 is Z axis upper limit input; 7th pin 37 is Z axis lower limit input; 8th pin 38 is power input; 9th pin 39 is earth terminal; Tenth pin 311 is alarm signal end; 11 pin 312 is the first gap output; 12 pin 313 is the second gap output.
In a preferred approach, the input voltage of preamplifier 2 is 0-24VDC, and output current is 0-20mA.
Operation principle:
Under servomechanism duty, because laser nozzle 13 and the change of cut material surface distance can cause the change of electric capacity, by the capacitance detecting with dynamic sensor 1, be sent to preamplifier 2 through high frequency cable 4, preamplifier 2 carries out signal conversion, be sent to after controller 3 through control cables 5 again, the judgement of laser nozzle 13 and cut material surface distance can be made.If the servo-actuated clearance distance of setting is 1mm in controller 3, and when detecting that laser nozzle 13 is greater than 1mm apart from the surface distance of cut material by sensor cutter sweep 1, controller 3 can drive z-axis to allow laser nozzle 13 reduce with the surface distance of cut material, until arrive 1mm; Otherwise if when detecting that laser nozzle 13 is less than 1mm apart from the surface distance of cut material, controller 3 can drive z-axis to allow laser nozzle 13 strengthen, until reach 1mm with the surface distance of cut material.
The technique effect of the present embodiment is: adopt contactless type capacitance sensor, sensor and cutting head integrated design, by preamplifier and controller, realize the focal position adaptive location closed-loop control of laser, and then reach the cutting processing effect of high-quality, high stability.
As shown in Figure 8, PLC programme-control is described further.
Below be only a preferred embodiment of the present invention, described detailed description of the invention just understands core concept of the present invention for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify the protection domain also belonging to the claims in the present invention.
Claims (8)
1. a servomechanism, is characterized in that,
Comprise with dynamic sensor, preamplifier, controller, high frequency cable and control cables;
Describedly to be connected with described preamplifier by high frequency cable with dynamic sensor;
Described preamplifier is connected with described controller by control cables.
2. servomechanism according to claim 1, is characterized in that,
Describedly comprise sensor body, ceramic body, locking nut, laser nozzle and BNC connector with dynamic sensor;
Described BNC connector is fixed by screws in the side of described sensor body, outer side joint high frequency cable, and inner side is connected with spring probe by fire resistant electric wire;
The upper surface of described sensor body is connected with cutting head by screw thread;
The lower surface of described sensor body connects with the upper surface of ceramic body by the position of locating hole;
Ceramic body is fixed on sensor body by screw thread by described locking nut;
Described laser nozzle is connected by the lower surface of screw thread with described ceramic body.
3. servomechanism according to claim 1, is characterized in that,
Described preamplifier comprises discharge circuit, first input end, the second input, the first output, the second output, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, triode, electric capacity, diode and power supply;
Described power supply first end connects described second output;
The first end of described first resistance connects the second end of described power supply;
The first end of described second resistance connects the second end of described first resistance;
The first end of described 3rd resistance connects the second end of described second resistance;
Second end of described 3rd resistance connects described second input;
The first end of described 4th resistance connects described first input end;
The first end of described discharge circuit connects the second end of described 4th resistance;
Second end of described discharge circuit connects the 3rd end of described second resistance;
The first end of described 5th resistance connects the second end of described 4th resistance;
The first end of described 6th resistance connects the 3rd end of described discharge circuit;
The first end of described triode connects the second end of described 6th resistance;
The first end of described 7th resistance connects the second end of described triode;
Second end of described 7th resistance connects the second end of described power supply;
Second end of the 5th resistance described in the three-terminal link of described 7th resistance;
The first end of described diode connects the 3rd end of described triode;
Second end of described diode connects described first output;
The first end of described electric capacity connects the 3rd end of described triode;
Second end of described electric capacity connects described second output.
4. servomechanism according to claim 1, is characterized in that,
Described controller is PLC;
Described controller comprises the first pin, the second pin, three-prong, the 4th pin, the 5th pin, the 6th pin, the 7th pin, the 8th pin, the 9th pin, the tenth pin, the 11 pin;
Described first pin and the second pin are 232 interfaces;
Described three-prong and the 4th pin are that motor drives interface;
Described 5th pin is warning output interface;
Described 6th pin is Z axis upper limit input;
Described 7th pin is Z axis lower limit input;
Described 8th pin is power input;
Described 9th pin is earth terminal;
Described tenth pin is alarm signal end;
Described 11 pin is the first gap output;
Described 12 pin is the second gap output.
5. servomechanism according to claim 2, is characterized in that,
Described laser nozzle is connected with described ceramic body by screw thread.
6. servomechanism according to claim 2, is characterized in that,
Described ceramic body comprises main-body electrode, wiring hole, the first locating dowel and the second locating dowel;
Described main-body electrode is provided with described wiring hole, described first locating dowel and described second locating dowel;
Described wiring hole is between described first locating dowel and the second locating dowel.
7. servomechanism according to claim 2, is characterized in that,
The main-body electrode of described ceramic body is connected with BNC connector through fire resistant electric wire by spring probe.
8. servomechanism according to claim 3, is characterized in that,
The input voltage of described preamplifier is 0-24VDC, and output current is 0-20mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410708589.0A CN104400218B (en) | 2014-11-28 | 2014-11-28 | A kind of servomechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410708589.0A CN104400218B (en) | 2014-11-28 | 2014-11-28 | A kind of servomechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104400218A true CN104400218A (en) | 2015-03-11 |
| CN104400218B CN104400218B (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410708589.0A Expired - Fee Related CN104400218B (en) | 2014-11-28 | 2014-11-28 | A kind of servomechanism |
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| Country | Link |
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| CN (1) | CN104400218B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111203653A (en) * | 2018-11-16 | 2020-05-29 | 中达电子零组件(吴江)有限公司 | Self-adaptive control device for adjusting position of laser cutting head and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202763289U (en) * | 2012-09-06 | 2013-03-06 | 苏州迅镭激光切割设备有限公司 | Laser cutting head |
| CN203751530U (en) * | 2013-12-25 | 2014-08-06 | 武汉高能激光设备制造有限公司 | Laser cutting assembly capable of automatically following focus |
| CN203778962U (en) * | 2014-04-02 | 2014-08-20 | 温州大学 | Measuring and processing integration laser processing head |
| US20140312018A1 (en) * | 2011-11-10 | 2014-10-23 | Ipg Photonics Corporation | Dynamic Height Adjusting System and Method for Head Assembly of Laser Processing System |
| CN204413386U (en) * | 2014-11-28 | 2015-06-24 | 北京大沃科技有限公司 | A kind of servomechanism |
-
2014
- 2014-11-28 CN CN201410708589.0A patent/CN104400218B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140312018A1 (en) * | 2011-11-10 | 2014-10-23 | Ipg Photonics Corporation | Dynamic Height Adjusting System and Method for Head Assembly of Laser Processing System |
| CN202763289U (en) * | 2012-09-06 | 2013-03-06 | 苏州迅镭激光切割设备有限公司 | Laser cutting head |
| CN203751530U (en) * | 2013-12-25 | 2014-08-06 | 武汉高能激光设备制造有限公司 | Laser cutting assembly capable of automatically following focus |
| CN203778962U (en) * | 2014-04-02 | 2014-08-20 | 温州大学 | Measuring and processing integration laser processing head |
| CN204413386U (en) * | 2014-11-28 | 2015-06-24 | 北京大沃科技有限公司 | A kind of servomechanism |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111203653A (en) * | 2018-11-16 | 2020-05-29 | 中达电子零组件(吴江)有限公司 | Self-adaptive control device for adjusting position of laser cutting head and control method thereof |
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| Publication number | Publication date |
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| CN104400218B (en) | 2016-03-23 |
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Granted publication date: 20160323 |