CN102179623A - Z axis elastic distance servo system used for laser processing - Google Patents
Z axis elastic distance servo system used for laser processing Download PDFInfo
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- CN102179623A CN102179623A CN2011101101082A CN201110110108A CN102179623A CN 102179623 A CN102179623 A CN 102179623A CN 2011101101082 A CN2011101101082 A CN 2011101101082A CN 201110110108 A CN201110110108 A CN 201110110108A CN 102179623 A CN102179623 A CN 102179623A
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Abstract
The invention discloses a Z axis elastic distance servo system used for laser processing, wherein a Z axis actuating mechanism is connected to a bracket; the bracket is provided with a fixed guiding sleeve and upper and lower limiting switches; a sliding guiding sleeve which can extend downwards is arranged in the fixed guiding sleeve; the lower end of the fixed guiding sleeve is provided with an anti-dropping cover; the lower end of the sliding guiding sleeve is provided with a connecting flange; a returning spring is arranged between the connecting flange and the anti-dropping cover; upper and lower limiting rods which are corresponding to the upper and lower limiting switches are arranged on the connecting flange; a laser head is fixed under the connecting flange and is aimed at a processed workpiece; a universal rolling ball head which can move on the surface of the processed workpiece is fixed under the connecting flange; and a constant vertical interval is kept between a light outlet of the laser head and the lower end of the universal rolling ball head. The Z axis elastic distance servo system can be used for realizing the elastic floatation of the laser head in a defined scope and realizing the quick ascending and descending of the laser head out of the preset scope by using the limiting switches to control a driving motor, thereby ensuring that the laser beam is focused on the surface of the processed workpiece all the time.
Description
Technical field
The present invention relates to the noncontact processing technique field, refer to a kind of Z axle elasticity spacing servomechanism that is used for Laser Processing particularly.
Background technology
At the noncontact manufacture field, as utilize laser to carry out in the process of cutting processing, the focus point of laser beam should be positioned at the work piece surface.In case the out of focus phenomenon occurs, promptly the relative work piece of the focus point of laser beam surface is offset, and will greatly lose the Laser Processing power density, and its attenuation curve is the geometric progression variation.Therefore, guarantee that the focus point of laser beam is positioned at the work piece surface, what just make the relative work piece of laser head surface is the key technology of Laser cutting apart from keeping constant.
For the focus point that guarantees laser beam is positioned at the work piece surface, the Z axle servomechanism of prior art with the work piece surface as X-Y plane, with the laser head that is suspended in described work piece surface as the Z axle, in process, laser head, just the Z axle is done along with the fluctuating on work piece surface to rise synchronously or down maneuver, keeps constant with the distance of guaranteeing the relative work piece of laser head surface.
At present, the Z axle servomechanism of Large-power High-Speed laser cutting machine adopts non-contact capacitance sensor servomechanism mostly.This system produces distance signal by the distance on the relative work piece of the capacitance measurement laser head surface of capacitance sensor, and distance signal feeds back to actuating motor after treatment, and rising or decline by actuating motor control laser head realize its lag function.The weak point of non-contact capacitance sensor servomechanism is: owing to be subjected to the influence of the irregular and capacitance sensor connecting circuit quality of work piece surface cutting path, the distance on the relative work piece of actuating motor control laser head surface is accurate inadequately, there is the danger of laser head and work piece collision, even the damage laser head, cause heavy economic losses.In addition, owing to need handle the distance signal that capacitance sensor produces, rise or descend according to treated distance signal control laser head again, there is the response lag effect in signal processing, so the rising of laser head or decline have certain time-delay.Moreover non-contact capacitance sensor servomechanism only is applicable to that work piece is the situation of metalwork, then can't realize distance measurement function for the cutting of nonmetal parts.
Summary of the invention
Purpose of the present invention is exactly that a kind of Z axle elasticity spacing servomechanism that is used for Laser Processing will be provided.It can make the distance of the relative surface of the work of laser head keep constant in laser processing procedure, thereby the focus point that guarantees laser beam is positioned at surface of the work.
For achieving the above object, the Z axle elasticity spacing servomechanism that is used for Laser Processing that the present invention is designed comprises the laser head of laser process equipment and drives the Z axle executing agency that described laser head is made vertical displacement movement.The actuating station of described Z axle executing agency is connected with support, and described support is provided with vertically arranged fixedly guide pin bushing, upper limit position switch and lower position switch; Be provided with sliding guide sleeve in the inner chamber of described fixedly guide pin bushing, extend fixedly outside the guide pin bushing lower end of described sliding guide sleeve, and the lower end of described fixedly guide pin bushing is provided with the cap fall prevention that cooperates with sliding guide sleeve upper end flange butt.The lower end of described sliding guide sleeve is provided with adpting flange, and the sliding guide sleeve periphery between described adpting flange and the cap fall prevention is set with back-moving spring.Described adpting flange is provided with upper limit bar and lower limit bar, and the touching end of described upper limit bar is corresponding with the position of described upper limit position switch, and the touching end of described lower limit bar is corresponding with the position of described lower position switch.Described laser head is fixedly mounted on the below of described adpting flange and aims at work piece, the below of described adpting flange also is set with at least one universal rolling bulb that can move on the work piece surface, maintain constant vertical interval between the lower extreme point of the light-emitting window of described laser head and described universal rolling bulb, thereby make laser head institute emitted laser bundle focus on the work piece surface all the time.
Further, described Z axle executing agency comprises fixed frame, and described fixed frame is provided with the ball-screw that links to each other with drive motors, is provided with on the described ball-screw and moves the ball nut that cooperates with it, and described ball nut links to each other with support.
Again further, described support is a L type support, and the vertical plane of described L type support is fixedlyed connected with described ball nut by connector, and the horizontal plane of described L type support is fixedlyed connected with described fixedly guide pin bushing.
Further, be provided with a vertically arranged guide post on the described adpting flange at least, described fixedly guide pin bushing is provided with the pilot hole that is slidingly matched with described guide post, guarantees not rock when laser head descends elastic floating in vertical direction.
Further, the quantity that is provided with of described universal rolling bulb is 2～4, and preferred amount is 3, and being evenly arranged in described laser head is on the circumference in the center of circle, like this, can guarantee that it contacts reliably with the work piece surface-stable.
The invention has the advantages that: designed universal rolling bulb in process all the time with the work piece butt, designed sliding guide sleeve can fixedly be free to slide in the guide pin bushing, by being arranged on the reset response of the back-moving spring between adpting flange and the cap fall prevention, can in prescribed limit, realize the elastic floating of laser head, in case surpass prescribed limit promptly realizes laser head by limit switch control drive motors fast lifting.Owing to maintain constant vertical interval between the light-emitting window of laser head and the lower extreme point of described universal rolling bulb, both can avoid laser head in process, to clash into work piece and damaged, can guarantee again that the focus point of laser beam accumulated in the surface of work piece all the time exactly.And the present invention need not electric elements such as capacitance sensor, need not control signal is handled, and has avoided the response lag effect in the spacing process.In addition, the spacing precision is not subjected to the influence of connecting circuit quality, can avoid laser head because of circuit problem generation false hit.Simultaneously, the workpiece material of the present invention's processing is unrestricted, is suitable for the processing of various metal materials and nonmetallic materials, has wide range of applications.
Description of drawings
Fig. 1 is a kind of main TV structure schematic diagram that is used for the Z axle elasticity spacing servomechanism of Laser Processing.
Fig. 2 is the left TV structure schematic diagram of Fig. 1.
Fig. 3 is the A-A sectional structure schematic diagram of Fig. 1.
The specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1 to Figure 3, the present invention is used for the Z axle elasticity spacing servomechanism of Laser Processing, comprises the laser head 2 of laser process equipment and the Z axle executing agency 12 that driving laser head 2 is made vertical displacement movement.Z axle executing agency 12 comprises fixed frame 12d, and fixed frame 12d is provided with the ball-screw 12b that links to each other with drive motors 12a, and ball-screw 12b goes up to be provided with and moves the ball nut 12c that cooperates with it, and ball nut 12c links to each other with support 11.Drive motors 12a can select servomotor or stepper motor for use.
There is adpting flange 3 lower end of sliding guide sleeve 6 by the screw rigid attachment, and sliding guide sleeve 6 peripheries between adpting flange 3 and the cap fall prevention 8 are set with back-moving spring 5.Adpting flange 3 is provided with the corresponding upper limit bar 4 in position of touching end and upper limit position switch 9; Also be provided with the corresponding lower limit bar 14 in position of touching end and lower position switch 15 on the adpting flange 3.
Do not rock when guaranteeing that laser head 2 descends elastic floating in vertical direction, adpting flange 3 is provided with a vertically arranged guide post 7, and fixedly guide pin bushing 10 is provided with the pilot hole 10a that is slidingly matched with guide post 7.In the laser processing procedure, guide post 7 is slidingly matched in pilot hole 10a all the time.
Operation principle of the present invention is as follows:
In laser processing procedure, the following endvertex 1a of universal rolling bulb 1 keeps in touch with workpiece 13 under the elastic forepressure of back-moving spring 5 all the time, and universal rolling bulb 1 and rise and fall in the elastic range of regulation with the height on workpiece 13 surfaces with the adpting flange 3 of its rigid attachment, movable guide pin bushing 6 moves up and down according to fixing guide pin bushing 10.Because laser head 2 light-emitting windows are constant to the vertical range δ of 1 time endvertex 1a of universal rolling bulb, can make laser head 2 not collide work piece 13, and the focus point of laser beam accumulates in the surface of work piece 13, realization elasticity spacing lag function all the time exactly.
The position height of upper limit position switch 9 and lower position switch 15 difference upper limit of detection position bars 4 and lower limit bar 14.When work piece 13 rats cause upper limit bar 4 to contact with upper limit position switch 9, upper limit position switch 9 starts drive motors 12a, drive ball-screw 12b and ball nut 12c, realize the fast rise of laser head 2, when rising to assigned position, upper limit position switch 9 disconnects, and drive motors 12a quits work, and native system is realized the servo-actuated of elasticity spacing again in new position.When work piece 13 surface depressions cause lower limit bar 14 to contact with lower position switch 15, lower position switch 15 starts drive motors 12a, drive ball-screw 12b and ball nut 12c, realize the quick decline of laser head 2, when dropping to assigned position, lower position switch 15 disconnects, and drive motors 12a quits work, and native system is realized the servo-actuated of elasticity spacing again in new position.
In the fast rise or decline process of laser head 2, back-moving spring 5 carries out corresponding expanding-contracting action, the following endvertex 1a that guarantees universal rolling bulb 1 keeps in touch with work piece 13 under the elastic forepressure of back-moving spring 5 all the time, focuses on the surface of work piece 13 all the time to guarantee 2 emitted laser bundles of laser head.
Claims (8)
1. Z axle elasticity spacing servomechanism that is used for Laser Processing, comprise the laser head (2) of laser process equipment and drive the Z axle executing agency (12) that described laser head (2) is made vertical displacement movement, it is characterized in that: the actuating station of described Z axle executing agency (12) is connected with support (11), and described support (11) is provided with vertically arranged fixedly guide pin bushing (10), upper limit position switch (9) and lower position switch (15); Be provided with sliding guide sleeve (6) in the inner chamber of described fixedly guide pin bushing (10), extend fixedly outside the guide pin bushing (10) lower end of described sliding guide sleeve (6), and the lower end of described fixedly guide pin bushing (10) is provided with the cap fall prevention (8) that cooperates with sliding guide sleeve (6) upper end flange butt; The lower end of described sliding guide sleeve (6) is provided with adpting flange (3), and sliding guide sleeve (6) periphery between described adpting flange (3) and the cap fall prevention (8) is set with back-moving spring (5); Described adpting flange (3) is provided with upper limit bar (4) and lower limit bar (14), the touching end of described upper limit bar (4) is corresponding with the position of described upper limit position switch (9), and the touching end of described lower limit bar (14) is corresponding with the position of described lower position switch (15); Described laser head (2) is fixedly mounted on the below of described adpting flange (3) and aims at work piece (13), the below of described adpting flange (3) also is set with at least one universal rolling bulb (1) that can move on work piece (13) surface, maintain constant vertical interval (δ) between the lower extreme point (1a) of the light-emitting window of described laser head (2) and described universal rolling bulb (1), thereby make laser head (2) institute emitted laser bundle focus on work piece (13) surface all the time.
2. according to the described Z axle elasticity spacing servomechanism that is used for Laser Processing of claim 1, it is characterized in that: described Z axle executing agency (12) comprises fixed frame (12d), described fixed frame (12d) is provided with the ball-screw (12b) that links to each other with drive motors (12a), described ball-screw (12b) is gone up to be provided with and is moved the ball nut (12c) that cooperates with it, and described ball nut (12c) links to each other with support (11).
3. according to the described Z axle elasticity spacing servomechanism that is used for Laser Processing of claim 2, it is characterized in that: described support (11) is a L type support, the vertical plane of described L type support is fixedlyed connected with described ball nut (12c) by connector, and the horizontal plane of described L type support is fixedlyed connected with described fixedly guide pin bushing (10).
4. according to claim 1 or the 2 or 3 described Z axle elasticity spacing servomechanisms that are used for Laser Processing, it is characterized in that: be provided with a vertically arranged guide post (7) on the described adpting flange (3) at least, described fixedly guide pin bushing (10) is provided with the pilot hole (10a) that is slidingly matched with described guide post (7).
5. according to claim 1 or the 2 or 3 described Z axle elasticity spacing servomechanisms that are used for Laser Processing, it is characterized in that: the quantity that is provided with of described universal rolling bulb (1) is 2～4, and being evenly arranged in described laser head (2) is on the circumference in the center of circle.
6. according to the described Z axle elasticity spacing servomechanism that is used for Laser Processing of claim 4, it is characterized in that: the quantity that is provided with of described universal rolling bulb (1) is 2～4, and being evenly arranged in described laser head (2) is on the circumference in the center of circle.
7. according to claim 1 or the 2 or 3 described Z axle elasticity spacing servomechanisms that are used for Laser Processing, it is characterized in that: the quantity that is provided with of described universal rolling bulb (1) is 3, and being evenly arranged in described laser head (2) is on the circumference in the center of circle.
8. according to the described Z axle elasticity spacing servomechanism that is used for Laser Processing of claim 4, it is characterized in that: the quantity that is provided with of described universal rolling bulb (1) is 3, and being evenly arranged in described laser head (2) is on the circumference in the center of circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110110108 CN102179623B (en) | 2011-04-28 | 2011-04-28 | Z axis elastic distance servo system used for laser processing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110110108 CN102179623B (en) | 2011-04-28 | 2011-04-28 | Z axis elastic distance servo system used for laser processing |
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| CN102179623A true CN102179623A (en) | 2011-09-14 |
| CN102179623B CN102179623B (en) | 2013-09-18 |
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| CN 201110110108 Expired - Fee Related CN102179623B (en) | 2011-04-28 | 2011-04-28 | Z axis elastic distance servo system used for laser processing |
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| CN104741749A (en) * | 2015-04-03 | 2015-07-01 | 江苏理工学院 | Equidistant cutting device for thin plate covering parts |
| CN104781034A (en) * | 2012-11-09 | 2015-07-15 | 乔治洛德方法研究和开发液化空气有限公司 | Laser nozzle having internal mobile element and external cover |
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| CN110899962A (en) * | 2019-12-19 | 2020-03-24 | 苏州德吉克激光设备有限公司 | Intelligent focusing device and method for optical fiber laser cutter |
| CN111889879A (en) * | 2020-07-25 | 2020-11-06 | 远特信电子(深圳)有限公司 | Laser welding machine |
| CN112122261A (en) * | 2020-10-19 | 2020-12-25 | 深圳新控自动化设备有限公司 | Triaxial laser cleaning machine |
| CN112662854A (en) * | 2020-12-18 | 2021-04-16 | 天津大学 | Automatic ultrasonic shot blasting device and method for processing metal sheet |
| CN113579597A (en) * | 2021-07-29 | 2021-11-02 | 湖北欧阳华俊专用汽车有限公司 | Automatic welding machine |
| CN113386173A (en) * | 2021-08-17 | 2021-09-14 | 南京泰普森自动化设备有限公司 | Torque measuring device |
| CN114226994A (en) * | 2021-11-16 | 2022-03-25 | 南京兰江水处理设备有限公司 | End beam laser cutting device and method for mud scraper |
| CN115635189A (en) * | 2022-12-23 | 2023-01-24 | 苏州沪港科技股份有限公司 | Laser cutting machine is used in processing of switch board casing |
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