CN110711958A - Anti-interference high-precision laser cutting machine driven by linear motor and control method thereof - Google Patents
Anti-interference high-precision laser cutting machine driven by linear motor and control method thereof Download PDFInfo
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- CN110711958A CN110711958A CN201911117456.5A CN201911117456A CN110711958A CN 110711958 A CN110711958 A CN 110711958A CN 201911117456 A CN201911117456 A CN 201911117456A CN 110711958 A CN110711958 A CN 110711958A
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- 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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- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Laser Beam Processing (AREA)
- Linear Motors (AREA)
Abstract
The invention relates to the field of laser cutting machine equipment, and discloses a disturbance-resistant high-precision linear motor driven laser cutting machine and a control method thereof. When the linear motor structure is used for a laser cutting machine, the edge effect is reduced, the thrust fluctuation is inhibited, the high-precision positioning adjustment is promoted, and the rapid speed reduction positioning can be realized.
Description
Technical Field
The invention relates to the field of laser cutting machine equipment, in particular to a laser cutting machine driven by an anti-interference high-precision linear motor and a control method thereof.
Background
The linear motor is structurally broken through, can be directly driven linearly, does not need other intermediate links, and has the characteristic of zero rotation of a feeding system, but simultaneously, the influence brought by mechanical transmission enables the linear motor to lose the advantages of intermediate structures such as gears and the like in speed reduction, and the necessary time for reducing the speed to be zero is long. When the linear motor is specifically applied to a laser cutting machine, on one hand, the linear motor needs to realize the positioning of the laser emitter at any position on a plane, and on the other hand, the influence of the internal disturbance of the linear motor on the accurate position sending of the laser emitter is overcome, so that the high-precision control is realized.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the laser cutting machine which can be quickly decelerated and fixed and has high cutting precision, high interference resistance and high precision and is driven by a linear motor.
The invention solves the technical problems through the following technical means:
the utility model provides a high-accuracy linear electric motor driven laser cutting machine of interference immunity, be open-ended rail including one side, be arranged two vertical way stators that are parallel to each other in the rail, and the slidingtype cross road stator of erectting on two vertical way stators, the overlap portion of cross road stator and vertical way stator is provided with first active cell, the cross road stator includes the magnetic pole that sets up in its axial both sides, the magnetic pole passes through aluminum plate with the cross road stator and is connected, sliding connection has the second active cell on the cross road stator, second active cell top carrier platform is provided with laser emitter and micron position sensor, vertical way stator end is provided with the brake equipment who is used for reducing speed horizontal way stator.
The invention has the advantages that: through setting up the displacement on two vertical way stators, the horizontal way stator framework laser emitter horizontal planes, add magnetic pole, brake equipment, the magnetic pole produces the magnetic field on the one hand, can weaken the limit end effect of second active cell, and on the other hand the magnetic pole can be as brake equipment's starting drive, helps brake equipment to realize the quick response, location horizontal way stator slows down in the twinkling of an eye.
Another object of the present invention is to provide a method for controlling a linear motor driven laser cutting machine with high precision control.
The invention solves the technical problems through the following technical means:
a control method of a laser cutting machine driven by an anti-interference high-precision linear motor comprises the following steps:
s1, establishing a coordinate system: to crossThe moving path on the road stator is an X axis, the moving path on the longitudinal stator is a Y axis to establish a working area plane coordinate system, one side close to the brake device is an inner end, one side end part of the moving path of the transverse stator is a starting point position, and when the second mover is located at the starting point position of the innermost end, the distance information between the micrometer position sensor and the fence is a coordinate origin f0(a0,b0)，a0Information on the distance of the micrometer position sensor from the longitudinal part of the fence, b0Distance information of the micrometer position sensor and a transverse part of the fence on the same side with the starting position is obtained;
s2, calculation of laser path: loading the target processing pattern into cutting software and converting the target processing pattern into a plurality of position points fx(ax,bx) The connected path information is transmitted to the controller, and the controller calculates the coordinate origin and the different position points fx-f0＝(ax-a0,bx-b0) The distance difference of (a);
s3, determination of laser path: the controller drives the first rotor and the second rotor to enable the laser emitter to displace corresponding distance difference, and position information collected by the micrometer position sensor is fed back to the controller in real time;
s4, correction of laser path: the laser route controller further adjusts the laser transmitter to a position point f according to the position fed back by the micron position sensorx(ax,bx) Then, starting a laser transmitter;
s5, deceleration: when the transverse stator slides to the guide rail road section, the pulley is attached to the limiting pile, the magnetic poles on the two sides are close to the reed pipe sensor, the reed pipe sensor transmits position detection information to the controller, the controller controls the cylinder to brake, and the outer end of the cylinder abuts against the pulley to achieve limiting of the transverse stator.
The invention has the advantages that: the distance difference of each point is used as a moving instruction, the micrometer position sensor is used for accurate positioning, timely feedback correction is carried out, the disturbance of the linear motor is absorbed, and high-precision control in the machining process of the laser cutting machine is achieved.
Drawings
Fig. 1 is a schematic structural diagram of the invention.
FIG. 2 is a schematic structural diagram of the connection relationship between the longitudinal stator and the transverse stator.
FIG. 3 is a schematic structural diagram of the braking device of the present invention.
FIG. 4 is a schematic path diagram according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a disturbance-resistant high-precision laser cutting machine driven by a linear motor includes a rail 50 with an opening on one side, two longitudinal stators 10 parallel to each other and a transverse stator 20 slidably mounted on the two longitudinal stators 10 are disposed in the rail 50, a first rotor is disposed at an overlapping portion of the transverse stator 20 and the longitudinal stators 10, and a second rotor 30 is slidably connected to the transverse stator 20. The transverse stator 20 is slidably mounted on the two longitudinal stators 10 to form a sliding fit, so that the second mover 30 moves to any position on a working plane formed by the transverse stator 20 and the longitudinal stators 10.
The transverse stator 20 comprises magnetic poles 21 arranged on two axial sides of the transverse stator, the magnetic poles 21 are connected with the transverse stator 20 through aluminum plates 22, magnetic fields are arranged on the magnetic poles 21, the magnetic poles are arranged on two sides of the transverse stator 20 and can weaken the edge effect of the first rotor and reduce the disturbance of a linear motor system, a load platform 31 at the top end of the second rotor 30 is provided with a laser emitter 32 and a micron position sensor 33, the micron position sensor 33 is used for monitoring the specific coordinate position of the laser emitter 32 on a working plane and feeding back to an upper position, a brake device 40 is arranged at the tail end of the longitudinal stator 10, and the brake device 40 is arranged at the tail end of the longitudinal stator 10 and used for instantly decelerating the transverse stator 20.
As the concrete structure of the brake device 40, the brake device 40 includes the guide rail 41 butted with the longitudinal stator 10, because the guide rail 41 does not lay the permanent magnet compared with the longitudinal stator 10, therefore the displacement pushing to the transverse stator 20 is relatively weakened, the guide rail 41 sets up the position limiting pile 42 that matches with the side of the transverse stator 20 close to the brake device 40 vertically, both sides of the position limiting pile 42 install the air cylinder 43, there are dry reed pipe sensors 44 on the same side of the air cylinder 43, the dry reed pipe sensors 44 react instantaneously and promote the reaction of the air cylinders 43 installed on both sides when the magnetic field of the magnetic pole 21 is close, while the position limiting pile 42 is limited to the transverse stator 20, clamp and position on both sides of the transverse stator 20, make the transverse stator 20 slow down to zero, realize the instantaneous locking of the transverse stator 20.
The transverse stator 20 is slidably erected on the two longitudinal stators 10 to form a sliding fit, a guide bar 11 is arranged at the top end of each longitudinal stator 10 along the path direction, and pulleys 23 forming a traveling mechanism with the guide bar 11 are rotatably connected to the bottom ends of the two sides of the transverse stator 20; the sliding friction can be reduced by adopting the pulley 23 due to the large load on the longitudinal stator 10, which is convenient for the rapid effect of the transverse stator 20 on the moving instruction, the sliding rails 24 are arranged on both sides of the transverse stator 20 along the path direction, the guide block which forms a sliding connection with the sliding rails 24 is arranged on the side wall of the second mover 30 close to the transverse stator 20, the top end of the second mover 30 is the load-bearing table 31, the load is not high, and the second mover is directly connected with the laser emitter 32 and the micrometer position sensor 33, so that the sliding mode that the guide block and the sliding rails 24 are matched with each other is adopted, and the precision of driving and positioning is improved.
As a further improvement of the above scheme, two guide bars 11 are arranged along the path direction of the longitudinal stator 10, two limit piles 42 are arranged on the two guide bars 11, two pulleys 23 forming a traveling mechanism with the guide bars 11 are rotatably connected to the bottom ends of the two sides of the transverse stator 20, the first rotor is located between the two pulleys 23, and two cylinders 43 are respectively arranged on two sides of the two pulleys 23. The double guide bars 11 and the double pulleys 23 are arranged, so that the transverse stator 20 can slide along a specified travelling path, and the double pulleys 23 correspond to the double limiting piles 42, so that the speed reduction capability is enhanced.
Wherein, the limiting pile 42 is arc-shaped, the inner profile of the arc of the limiting pile 42 is matched with the profile of the outer ring of the pulley 23, the fitting degree is improved, the friction surface is increased, and the friction resistance is improved.
The loading platform 31 is embedded with a controller, and the controller is electrically connected with the laser emitter 32, the micrometer position sensor 33, the first rotor, the second rotor 30, the cylinder 43 and the reed switch sensor 44 respectively. The controller collects the position information collected by the micrometer position sensor 33 and the reed pipe sensor 44, and feeds back the position information in time to control the first rotor, the second rotor 30 and the cylinder 43 to perform motion compensation, so that synchronous operation and control of all parts are realized.
The control method of the anti-interference high-precision linear motor driven laser cutting machine comprises the following steps:
establishing a coordinate system: for convenience of daily feeding, one side of the fence 50 is provided with an opening, according to the processing habit from inside to outside and from left to right, one side close to the brake device 40 is taken as an inner end, the end part of the right side end part of the advancing path of the transverse stator 20 is taken as a starting point position, the advancing path on the transverse stator 20 is taken as an X axis, the advancing path on the longitudinal stator 10 is taken as a Y axis to establish a working area plane coordinate system, and when the second mover 30 is positioned at the starting point position of the innermost end, the distance information between the micrometer position sensor 33 and the fence 50 is taken as a coordinate origin point f0(a0,b0) And a is the distance information between the micrometer position sensor 33 and the longitudinal part of the fence 50, and b is the distance information between the micrometer position sensor 33 and the transverse part of the fence 50, and the working area is cut into a plane coordinate system with micrometer as the minimum positioning unit, so that high positioning accuracy is ensured.
Laser cutting: as shown in FIG. 4, loading the target processing pattern into the cutting software is converted into a plurality of position points f1(a1,b1)、f2(a2,b2)、f3(a3,b3)、f4(a4,b4).......fx(ax,bx) The linked path information is transmitted to the controller, and the controller calculates the coordinate origin f0From different points fxDistance difference f ofx-f0＝(ax-a0,bx-b0) The controller drives the first and second movers 30 to displace the laser emitter 32 by a corresponding distance difference from the origin, according to the processing habit from inside to outside and from left to right, and bx-b0Numerical size arranged as parent mobile directory, in the same bx-b0On the premise of the numerical value, the value is expressed by ax-a0Numerical size arrangement as child mobile directory, parent mobile directory running with same bx-b0On the premise of the numerical value, the operation of the sub mobile directory is finished;
the position information collected by the micron position sensor 33 is fed back to the controller in real time, and the controller further adjusts the laser emitter 32 to the position point f according to the position fed back by the micron position sensor 33x(ax,bx) Then, the laser emitter 32 is started at the moment, so that the influence of the internal disturbance of the linear motor system on the accurate positioning can be absorbed and eliminated;
at the same time, the origin of coordinates f0(a0,b0) The laser cutting machine can also be established as any coordinate point on the workbench so as to meet the requirement that the laser cutting machine starts cutting at any position.
Decelerating: when the transverse stator 20 slides to the guide rail 41, the pulley 23 is attached to the limiting pile 42, the magnetic poles 21 on the two sides are close to the reed pipe sensor 44, the reed pipe sensor 44 transmits position detection information to the controller, the controller controls the cylinder 43 to brake, the outer end of the cylinder 43 is abutted to the pulley 23, the limiting of the transverse stator 20 is achieved instantly, and the time required for speed reduction is shortened.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A laser cutting machine driven by an anti-interference high-precision linear motor is characterized by comprising a fence (50) with an opening at one side, two longitudinal stators (10) which are parallel to each other are arranged in the fence (50), and the transverse stator (20) is slidably erected on the two longitudinal stators (10), a first rotor is arranged at the overlapping part of the transverse stator (20) and the longitudinal stators (10), the transverse stator (20) comprises magnetic poles (21) arranged at two axial sides of the transverse stator, the magnetic poles (21) are connected with the transverse stator (20) through aluminum plates (22), a second rotor (30) is connected onto the transverse stator (20) in a sliding manner, a load table (31) at the top end of the second rotor (30) is provided with a laser emitter (32) and a micrometer position sensor (33), and a brake device (40) for reducing the speed of the transverse stator (20) is arranged at the tail end of the longitudinal stator (10).
2. The laser cutting machine driven by the anti-interference high-precision linear motor according to claim 1, wherein the brake device (40) comprises a guide rail (41) butted with the longitudinal stator (10), a limiting pile (42) matched with one side, close to the brake device (40), of the transverse stator (20) is vertically arranged on the guide rail (41), air cylinders (43) are installed on two sides of the limiting pile (42), and reed pipe sensors (44) are arranged on the same side of the air cylinders (43).
3. The laser cutting machine driven by the anti-interference high-precision linear motor according to claim 2 is characterized in that a guide bar (11) is arranged at the top end of the longitudinal path stator (10) along the path direction, a limiting pile (42) is arranged on the guide bar (11), and pulleys (23) forming a traveling mechanism with the guide bar (11) are rotatably connected to the bottom ends of the two sides of the transverse path stator (20); slide rails (24) are arranged on two sides of the transverse stator (20) along the path direction, and guide blocks which are in sliding connection with the slide rails (24) are arranged on the side wall, close to the transverse stator (20), of the second rotor (30).
4. The laser cutting machine driven by the anti-interference high-precision linear motor according to claim 2 is characterized in that two guide bars (11) are arranged along the path direction of the longitudinal path stator (10), limiting piles (42) are arranged on the two guide bars (11), two pulleys (23) forming a traveling mechanism with the guide bars (11) are rotatably connected to the bottom ends of two sides of the transverse path stator (20), the first rotor is located between the two pulleys (23), and two air cylinders (43) are respectively arranged on two sides of the two pulleys (23).
5. The laser cutting machine driven by the anti-interference high-precision linear motor according to claim 3 or 4, characterized in that the limiting pile (42) is in a circular arc shape, and the inner contour of the circular arc of the limiting pile (42) is matched with the outer contour of the pulley (23).
6. The disturbance rejection high precision linear motor driven laser cutting machine according to any one of claims 1 to 4, wherein a controller is embedded in the load table (31), and the controller is electrically connected with the laser emitter (32), the micrometer position sensor (33), the first mover, the second mover (30), the cylinder (43) and the reed switch sensor (44), respectively.
7. The control method of the disturbance rejection high precision linear motor driven laser cutting machine according to claim 6, comprising the steps of:
s1, establishing a coordinate system: the moving path on the transverse stator (20) is taken as an X axis, and the moving path on the longitudinal stator (10) is taken as a Y axisA plane coordinate system of the vertical working area, wherein one side close to the brake device (40) is taken as the inner end, one side end part of the travel path of the transverse stator (20) is taken as the starting point position, and when the second mover (30) is positioned at the starting point position of the innermost end, the distance information between the micrometer position sensor (33) and the fence (50) is taken as the coordinate origin point f0(a0,b0)，a0Information of the distance of the micrometer position sensor (33) from the longitudinal part of the fence (50), b0Distance information of the micrometer position sensor (33) and the transverse part of the fence (50);
s2, calculation of laser path: converting the target processing pattern into a plurality of position points fx(ax,bx) The connected path information is transmitted to the controller, and the controller calculates the coordinate origin and the different position points fx-f0＝(ax-a0,bx-b0) The distance difference of (a);
s3, determination of laser path: the controller drives the first rotor and the second rotor (30) to enable the laser emitter (32) to displace corresponding distance difference, and position information collected by the micrometer position sensor (33) is fed back to the controller in real time;
s4, correction of laser path: the laser route controller further adjusts the laser emitter (32) to the position point f according to the position fed back by the micron position sensor (33)x(ax,bx) Then, the laser emitter (32) is started;
s5, deceleration: when the transverse stator (20) slides to the guide rail (41) section, the pulley (23) is attached to the limiting pile (42), the magnetic poles (21) on the two sides are close to the reed pipe sensor (44), the reed pipe sensor (44) transmits position detection information to the controller, the controller controls the air cylinder (43) to brake, and the outer end of the air cylinder (43) is abutted to the pulley (23) to achieve limiting of the transverse stator (20).
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| CN201911117456.5A CN110711958B (en) | 2019-11-15 | 2019-11-15 | Anti-interference high-precision laser cutting machine driven by linear motor and control method thereof |
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| CN110711958B CN110711958B (en) | 2021-11-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111790969A (en) * | 2020-08-10 | 2020-10-20 | 中铁物总资源科技有限公司 | A plasma automatic cutting method and system for side panels and end panels of railway scrapped freight cars |
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