CN217096137U - Calibrating device for flight light path of laser cutting machine - Google Patents

Abstract

The utility model discloses a calibrating device for the flying light path of a laser cutting machine, which comprises a calibrating laser and a target imager, wherein the calibrating laser comprises a body, a visible light laser, a glass bead set screw, a rear cover, a vertical adjusting screw, a horizontal adjusting screw and a protective cover; body one end is equipped with the ladder through-hole, and ladder through-hole one end is the toper, and visible light laser ware one end is spherical structure, and body one end sets up the round hole, and the body middle part sets up the flange boss, and the flange boss sets up three screw hole, and three screw hole is used for threaded connection glass pearl holding screw, vertical adjusting screw, horizontal adjusting screw respectively. The utility model adopts visible laser as the light source for calibration and the target marked with cross lines and a target ring as the reference, thereby greatly improving the calibration precision; compared with the original laser source for processing operation as a calibration light source, the laser source for processing operation avoids accidents such as personal injury or fire disasters caused by misoperation or diffuse reflection of laser, and greatly improves safety.

Description

Calibrating device for flight light path of laser cutting machine

Technical Field

The utility model relates to a laser cutting machine light path calibration technical field especially relates to a calibrating device of laser cutting machine flight light path.

Background

The laser cutting machine focuses laser emitted from a laser into a laser beam with high power density through an optical path system. The laser beam irradiates the surface of the workpiece to make the workpiece reach a melting point or a boiling point, and simultaneously, the high-pressure gas coaxial with the laser beam blows away the molten or gasified metal.

Under the prior art, the laser wavelength for cutting processing is 1060-1064 nm, so that the laser is invisible light. Therefore, for a large laser cutting machine, a camera or a sensor capable of imaging invisible light is usually adopted to image attenuated laser beams, a machine vision algorithm is used to judge whether the light beams have deviation, and then a computer motion control system is used to control the motion of a reflector on an electric mirror base to correct the deviation. The system relates to complex systems such as machine vision, motion control, computer-aided operation and the like. The cost is high, certain requirements are required on the skill and experience of an operator, and for small and medium-sized laser cutting machines, cost control is limited, and the automatic calibration scheme controlled by the computer cannot be adopted generally.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and the calibrating device of a laser cutting machine flight light path that proposes to solve the problem that exists among the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a calibration device for a flight light path of a laser cutting machine comprises a calibration laser and a target imager, wherein the calibration laser is composed of a body, a visible light laser, a glass bead set screw, a rear cover, a vertical adjusting screw, a horizontal adjusting screw and a protective cover;

body one end is equipped with the ladder through-hole, and ladder through-hole one end is the toper, and visible light laser ware one end is spherical structure, and body one end sets up the round hole, and the body middle part sets up the flange boss, and the flange boss sets up three screw hole, and three screw hole is used for threaded connection glass pearl holding screw, vertical adjusting screw, horizontal adjusting screw respectively.

Preferably, body one end threaded connection back lid, back lid one end sets up the internal thread, and the back lid other end sets up the external screw thread.

Preferably, the other end of the body is in threaded connection with a protective cover.

Preferably, the protective cover is provided with a target ring.

Preferably, the target imager is composed of a base, a lever arm, a hinge bolt, a target chute, a target slider, an imaging target, a target locking screw, a target chute end cover, a stroke fine-tuning bolt and a wedge ball rotating mechanism;

the base upside sets up heavy groove, and the lever arm passes through articulated bolt and connects in heavy inslot, and the mark target spout passes through articulated bolt and connects in lever arm one side, and mark target slider sliding connection is in mark target spout, and the formation of image mark target passes through mark target locking screw fixed connection in mark target slider one side, mark target spout upside fixed connection mark target spout end cover, and stroke fine setting bolt rotates with mark target spout end cover to be connected, stroke fine setting bolt and mark target slider threaded connection.

Preferably, the wedge ball slewing mechanism includes beat adjusting screw, internal thread copper sheathing the heavy groove upside sets up the round hole, sliding connection steel ball in the round hole, and the lower extreme of round hole sets up the slip chamber, sliding connection slip post in the slip chamber, and the one end that the slip post is close to the steel ball is the inclined plane, and base one side is through internal thread copper sheathing threaded connection beat adjusting screw, and beat adjusting screw one end contacts with the slip post.

Preferably, the lever arm is fixedly connected with the sinking groove and is fixedly connected with the return spring.

Preferably, four magnets are fixedly connected to the bottom of the base.

The utility model has the advantages that: the utility model provides a calibrating device of laser cutting machine flight light path adopts visible laser as the light source for the calibration, and the beam diameter is 1/3 ~ 1/6 of the processing laser source that the point shooting paper target method adopted only, and adopts the mark target of marking cross line and target ring as the reference, can improve the calibration accuracy by a wide margin;

2. the power of the adopted calibration visible light laser 11 is as low as 10mw or below, compared with the original laser source for processing operation as a calibration light source, the possibility of personal injury or fire and other accidents caused by misoperation or laser diffuse reflection is avoided, and the safety is greatly improved;

3. the imaging target 25 made of firm and durable materials is adopted to replace a textured paper target in the traditional method, can be repeatedly used, and avoids the damage of the paper target after multiple burning, the loss of early test results, repeated labor and labor hour consumption which have to be reworked.

4. And changing the sequence of optical path calibration, and reversely calibrating the optical path from the far field to the near field. The installation position of the laser generator 50 and the manner of the laser emission angle are finally adjusted by calibrating the good flight path. The method prevents the optical path error from exceeding the allowable range due to the base deviation existing in the installation position or the light-emitting angle of the laser generator 50 and the segment-by-segment amplification and accumulation of the optical path, and has the defects of low efficiency and labor hour loss caused by readjustment of the position of the laser generator 50 and recalibration.

5. The utility model discloses calibrating device structure and method are simple, whether the light path deviation has clear, objective with the decision standard of deviation degree. The current situation that fuzzy subjective judgment is made by depending on experience, hand feeling and the like of an operator is changed; on one hand, the consistency and the accuracy of the light path after calibration operation by different operators are improved; on the other hand, the technical threshold of the flight light path calibration of the laser cutting machine is reduced, so that equipment users can perform regular light path maintenance and adjustment without depending on professionals, and the production efficiency and the product yield are improved.

6. In the conventional forward optical path calibration method, the optical path calibration is performed only after the laser generator 50 is assembled. The reverse light path calibration method adopted by the device and the method of the utility model can finish more than 90% of light path calibration work before the laser generator 50 is not assembled or even the laser generator 50 is not purchased, thereby bringing optimized production schedule, capital utilization and storage capacity occupation for equipment enterprises; and the device processing and assembling errors are found in advance, and the labor hour is saved.

7. Because the device of the utility model has simple structure and controllable manufacturing cost. And complex and expensive systems such as computer-aided operation, machine vision, motion control, servo electric mirror frames and the like are not needed. But also can be used for the flight light path calibration of large, medium and small laser cutting machines. The economic and universal advantages are obvious.

Drawings

FIG. 1 is a schematic view of the working principle of the present invention;

fig. 2 is an exploded view of the calibration laser according to the present invention;

fig. 3 is a schematic diagram of the internal structure of the calibration laser according to the present invention;

fig. 4 is an exploded view of the target imager of the present invention;

fig. 5 is a schematic diagram of the basic structure of the target marking imager of the present invention;

fig. 6 is a schematic diagram of laser beam deviation imaging in the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-6, the utility model provides a calibrating device for laser cutting machine flight light path, including calibration laser and target imager, the calibration laser is by body 1, visible laser 11, glass bead set screw 12, back lid 13, vertical adjusting screw 14, horizontal adjusting screw 15, visor 16 constitute;

1 one end of body is equipped with the ladder through-hole, ladder through-hole one end is the toper, 11 one end of visible light laser is spherical structure, the ladder through-hole is used for the entering of visible light laser 11, 1 one end of body sets up round hole 32, round hole 32 is the laser light-emitting hole, 1 middle part of body sets up flange boss 17, flange boss 17 sets up three screw hole, three screw hole is used for threaded connection glass pearl holding screw 12 respectively, vertical adjusting screw 14, horizontal adjusting screw 15, 1 one end threaded connection back lid 13 of body, back lid 13 one end sets up the internal thread, the back lid 13 other end sets up the external screw thread, 1 other end threaded connection visor 16 of body, visor 16 sets up the mark target circle.

The visible light laser 11 is provided with a semiconductor laser tube inside, and the spectrum range of the visible light laser is 400-780nm, and the visible light laser can emit bright red light, green light or blue light. The power is less than 10 mw. Is driven by a built-in button cell and a circuit. The head of the visible light laser is spherical, the tail of the visible light laser is provided with a switch contact, the switch is switched on after the rear cover 13 is installed, and the visible light laser is electrified and emits laser. The laser beam diameter is about 1 mm.

The top of the glass bead fastening screw 12 is embedded with a movable steel bead which can rotate universally, and the three-point positioning of the visible laser 11 and the fine adjustment of the laser emission angle can be realized by matching with the vertical adjusting screw 14 and the horizontal adjusting screw 15.

The back cover 13 is of an internal and external double thread structure, and is combined with the boss external thread of the body 1 through an internal thread, and the inner surface of the back cover is provided with a circular conductive coating for conducting a switch contact of the visible light laser 11. The external thread is used for calibrating the light inlet hole screwed into the reflector base when the visible light laser 11 is reversely mounted.

The internal thread of the protective cover 16 is combined with the external thread of the boss in the light outlet direction of the body 1, so as to provide protection for the visible light laser 11 installed in the body 1. The material of the protective cover 16 is translucent ground glass or metal oxide ceramic material. The top surface is coated with an infrared fluorescent developing material and is printed with cross hairs and a target ring.

The target imager is composed of a base 2, a lever arm 21, a hinge bolt 22, a target chute 23, a target slide block 24, an imaging target 25, a target locking screw 26, a target chute end cover 27, a stroke fine adjustment bolt 28 and a wedge ball rotating mechanism;

the upside of base 2 sets up heavy groove, lever arm 21 is connected in heavy inslot through hinge bolt 22 is articulated, mark target spout 23 passes through hinge bolt 22 and articulates and connects in lever arm 21 one side, hinge bolt 22 is used for connecting base 2, lever arm 21 and mark target spout 23, base 2, lever arm 21 and mark target spout 23 can be around hinge bolt 22 axle center motion, but there is certain damping, lever arm 21 forms similar hand hay cutter type structure with base 2, can open during the measurement, can fold during the accomodation, mark target slider 24 sliding connection is in mark target spout 23, formation of image mark target 25 passes through mark target locking screw 26 fixed connection in mark slider 24 one side, mark target spout 23 upside fixed connection mark target spout end cover 27, stroke fine setting bolt 28 rotates with mark target spout end cover 27 and is connected, stroke fine setting bolt 28 and mark target slider 24 threaded connection.

Guide grooves are formed on both sides of the target slider 24, and the guide grooves restrict and guide the movement of the target slider 24 in the target slide groove 23. A slotted through hole is opened in the middle, and the imaging target 25 is mounted in the slotted hole. A threaded bore is also provided on one short side of the target slide 24 for connection to a travel adjustment bolt 28.

The wedge ball rotating mechanism comprises a deflection adjusting screw 3, an internal thread copper sleeve 31, a round hole 32 is arranged on the upper side of the sinking groove, the round hole 32 is connected with the steel ball in a sliding mode, the lower end of the round hole 32 is provided with a sliding cavity, a sliding column is connected in the sliding cavity in a sliding mode, one end, close to the steel ball, of the sliding column is an inclined plane, one side of the base 2 is connected with the deflection adjusting screw 3 through the internal thread copper sleeve 31 in a threaded mode, and one end of the deflection adjusting screw 3 is in contact with the sliding column; the deflection adjusting screw 3 pushes a wedge ball rotating mechanism positioned in the base 2, and a steel ball in the wedge ball driving mechanism is jacked up to lift one side of the lever arm 21; the deflection adjusting screw 3 is arranged in the internal thread copper sleeve 31, and the lever arm 21 can be driven to rise or fall by adjusting the deflection adjusting screw 3, so that the imaging target 25 finally generates a deflection motion of +/-5 degrees along the R axis, and the fine position adjustment of the imaging target 25 is completed.

The lever arm 21 is fixedly connected with the sinking groove and a return spring 33; one side of the lever arm 21 is respectively hinged with the base 2 and the target chute 23 through two hinge bolts; the bottom of the other side is connected with a steel ball in the wedge ball transmission mechanism. When the steel ball moves upwards, the lever arm 21 is lifted. When the steel ball moves downwards, the lever arm 21 is reset with the pin by a reset spring 33 connected with the base 2.

Both the base 2 and the lever arm 21 are provided with slotted through holes, and the target imager can be mounted on the surface of equipment with threaded holes by bolts.

Four magnets of 2 bottom fixed connection of base utilize magnet, can be with convenient absorption of mark target imager on the laser cutting machine arm of magnetic conduction metal like steel material. Or adsorbed on a temporary cushion block of magnetic conductive metal and then placed in the light path for use.

The process and the method for calibrating the light path by adopting the calibration device comprise the following specific steps:

firstly, roughly calibrating the verticality of the light path from the third reflector 30 to the surface of the cut workpiece 40;

second, calibrating the third mirror 30 to the second mirror 20;

thirdly, calibrating the light path from the second reflector 20 to the first reflector 10;

fourthly, calibrating a light path from the first reflector 10 to the laser generator 50;

and fifthly, measuring the accuracy of the corrected flight light path, and accurately correcting the verticality of the light path from the third reflector 30 to the surface of the cut workpiece 40.

1. Roughly calibrating the perpendicularity of the third reflector 30 to the surface light path of the cut workpiece 40

Before the light path calibration, the calibration visible light laser itself needs to be assembled and basically adjusted, firstly, the light outlet of the visible light laser 11 faces inwards and is arranged in the body 1, then, the rear cover 13 is assembled and screwed, and the visible light laser emits light; the second step is to assemble visor 16 to the body on, at this moment, the light beam of visible laser 11 shines on the translucent mark target of visor 16, and the facula is clear visible, if the facula coincidence is on the intersect of cross line, then need not adjust again, if the facula skew, then adjustable vertical adjusting screw 14 and horizontal adjusting screw 15, until facula and cross line intersect coincidence, then can judge that the laser emission angular deviation can satisfy rough calibration requirement, demolish visor 16 the back, can carry out the calibration work to the light path next step.

The calibrated visible light laser 11 is screwed into the light inlet of the third reflector 30, the visible light beam is reflected by the lens of the third reflector 30 for 90 degrees and emitted downwards vertically, and is condensed by the focusing lens barrel and then emitted from the light outlet, if the angle of the third reflector 30 is correct, a circular complete light spot is projected on the cutting working surface. Because the aperture of the light outlet is generally 1-2mm, and the diameter of the laser beam for calibration is about 1mm, when the third reflector 30 has an angle deviation, the reflection angle of the laser is greater than or less than 90 degrees and is not vertical, the laser beam can irradiate inside the light outlet cavity, and part of the light beam which does not emit light or does not emit light is blocked. These errors are present on the working surface, one is that the spot is not visible, and the other is that the spot is incomplete, being semi-circular or elliptical.

The perpendicularity of the section of the light path can be quickly judged by observing the existence and the form of light spots projected on the working surface by the laser. The verticality deviation can be eliminated by adjusting the adjusting screw on the third reflector 30 to calibrate the posture and angle of the lens of the third reflector 30 until the light beam completely passes through the light outlet and a complete circular light spot is projected on the working surface, and the rough calibration of the section of light path is finished.

Since the light exit of the calibrated visible laser is too short from the target-equipped protective cover 16, it is impossible to determine whether there is a slight deviation in the laser emission angle by observing the imaging position of the spot on the target-equipped protective cover 16. Therefore, this step can only perform a rough calibration on this segment of the optical path. After the laser generator 50 for cutting operation is mounted, the precise calibration of the optical path of the section can be completed by fine adjustment.

2. Calibrating the optical path between third mirror 30 and second mirror 20;

the calibration of the two-section optical path is based on the principle of 'two points are in one line' and 'the optical path is reversible'. Reverse calibration from the far field optical path to the near field optical path. The operation flow is basically the same.

a. Screwing the tail end of the calibrated visible laser 11, namely one end with a rear cover 13 into a light inlet hole of the third reflector 30;

b. the target imager was stably positioned with the X-axis mechanical arm closest to the second mirror 20 and deployed.

c. The laser head is pushed to the zero point of the stroke of the X-axis mechanical arm, namely the position closest to the second reflector 20, so that the light outlet of the calibrated visible laser is close to the imaging target 25 on the target imager as much as possible, and the observation of the target is not blocked;

d. manually adjusting the position of an imaging target 25 on the target imager, and finely adjusting by adjusting the spreading angle of the target assembly, the position of the imaging target 25 in a slotted hole on a target slider 24, a rotation stroke fine adjustment bolt 28 and a deflection adjustment screw 3 to make the light spot of the calibration laser beam coincide with the intersection point of the target cross line;

e. the laser head is pushed to the end of the X-axis mechanical arm's furthest travel, i.e., furthest from the second mirror 20. The change of the imaging position of the light spot on the imaging target 25 can be observed in the pushing process;

in most cases, as the distance between the third reflector 30 and the second reflector 20 of the laser head increases, the light spot gradually deviates from the target center point, which indicates that the light path is non-parallel to the movement axis, i.e. there is an included angle between the light path and the movement axis, and the beam offset increases with the increase of the stroke.

f. Adjusting a vertical adjusting screw 14 and a horizontal adjusting screw 15 on the calibration visible light laser 11, and finely adjusting the laser emission angle to enable the light spot to return to the target center point on the target imager again;

g. the laser head is pushed to the target imager at a constant speed again, then the laser head returns to the original position, the reciprocating motion is carried out for 1-2 times, and the position of the light spot at the center point of the target is observed whether to shake or change, if the operation of the steps is correct, the light spot always falls on the center of the target and does not deviate;

h. and removing the target imager, enabling the laser spot to be shot on the lens of the second reflector 20 and imaged, adjusting the mounting base of the lens base of the second reflector 20 to enable the laser spot to fall on the center of the reflector, and then screwing down screws on the mounting base.

And finishing the calibration operation of the section of the optical path.

3. Aligning the optical path between the second mirror 20 and the first mirror 10

a. The installation position of the calibrated visible light laser 11 is kept unchanged, and other adjustments are not made;

b. the target imager is stably placed at the position of the X-axis mechanical arm closest to the first mirror 10 and deployed.

Note that due to the mechanical structure, the target mirror will be at a greater distance from the first mirror 10 than the target imager is from the second mirror 20. Therefore, although the method for aligning the optical path between the second mirror 20 and the first mirror 10 is the same as the method for aligning the optical path between the third mirror 30 and the second mirror 20, it is generally repeated 2-3 times to achieve the same alignment accuracy. The reason is that only one section of the optical path, namely the distance between the second reflector 20 and the target imager, can be calibrated in a single calibration, but not the whole optical path, so that after 2-3 times of calibration, the deviation value of the optical path can be judged to be within an allowable range according to the principles of 'laser is transmitted along a straight line in the air' and 'two points are in a line' by observing that light spots do not shake or deviate at the central position of the target.

c. The X-axis mechanical arm is pushed to the zero point of the stroke of the Y-axis mechanical arm, namely the position closest to the first reflector 10, so that the light outlet of the calibrated visible light laser 11 is close to the imaging target 25 on the target imager as much as possible, and the standard of non-shielding observation is met;

d. manually adjusting the position of an imaging target 25 on the target imager, and finely adjusting by adjusting the spreading angle of the target assembly, the position of the imaging target 25 in a slotted hole on a target slider 24, a rotation stroke fine adjustment bolt 28 and a deflection adjustment screw 3 to make the light spot of the calibration laser beam coincide with the intersection point of the target cross line;

e. the X-axis robot is pushed to the end of the Y-axis robot's furthest travel, i.e., furthest from the first mirror 10. The change of the imaging position of the light spot on the target can be observed in the pushing process;

in most cases, as the distance between second mirror 20 and first mirror 10 increases, the light spot gradually deviates from the target center point, which indicates that the optical path is non-parallel to the movement axis, i.e. the optical path forms an angle with the movement axis, and the beam deviation range increases with the distance

f. Adjusting a fine adjustment screw on the second reflector 20, adjusting the deflection and pitch angles of the reflector, and finely adjusting the reflection angle of the laser to enable the light spot to return to the target center point on the target imager again;

g. repeating the step c-f for 1-2 times until the X-axis mechanical arm reciprocates twice or three times along the Y axis, namely changing the distance light path length between the first reflector 20 and the second reflector 20, and observing whether the position of the light spot at the center point of the target shakes or changes, wherein if the step c-f is operated correctly, the light spot always falls on the center of the target without deviation;

h. and removing the target imager, enabling the laser spot to be shot on the lens of the first reflector 10 and imaged, adjusting the mounting base of the lens base of the first reflector 10 to enable the laser spot to fall on the center of the reflector lens, and then screwing down the screw on the mounting base.

And finishing the calibration operation of the section of the optical path.

4. Calibrating the optical path between the first mirror 10 and the laser generator 50;

after the first three calibration steps are completed, the far-field light path of the laser cutting machine is completely calibrated, and if the equipment does not need to be provided with the laser generator 50 temporarily, the laser cutting machine can be put in storage in a semi-finished product form;

if the laser generator 50 is installed, the optical path near-field optical path from the first reflecting mirror 10 to the laser generator 50 is performed as follows:

a. the installation position of the calibrated visible light laser 11 is kept unchanged, and other adjustments are not made;

b. after the laser generator 50 is installed conventionally, observing whether a light spot projected on a light outlet of the laser generator 50 by the calibration laser beam reflected by the first reflector 10 is located at a central point, wherein the light outlet of the laser generator 50 is generally circular;

c. if the position of the light spot projected on the light outlet of the laser generator 50 by the calibration laser beam deviates from the center, adjusting a fine adjustment screw on the first reflector 10, and adjusting the deflection and pitch angles of the reflector, so as to change the laser reflection angle, and finally projecting the light spot on the center point of the light outlet of the laser generator 50;

and finishing the calibration operation of the section of the optical path.

5. And measuring the accuracy of the corrected flight light path, and accurately correcting the perpendicularity of the light path from the third reflector 30 to the surface of the cut workpiece 40.

After the five-step calibration operation, the flight light path after calibration is very close to the level of the ideal light path. However, the actual measurement is still required by using the spot emission method of the laser generator 50 because although the laser generator 50 is calibrated before shipping, generally, as shown in fig. 6, the laser beam is emitted from the center point e of the light outlet, the individual light beam emission points are deviated from the center of the light outlet d, or the laser emission angle is not an ideal 0 ° angle, which is very common and is not generally determined as the quality defect of the laser generator 50. Therefore, it is necessary to perform an accurate actual measurement on the calibrated flight optical path, and the specific implementation method thereof is as follows:

a. the installation position of the calibrated visible light laser is kept unchanged, and other adjustments are not made;

b. the component protective cover 16 for calibrating the visible light laser is arranged on the light outlet of the calibrated visible light laser, and the protective cover 16 is made of transparent materials such as explosion-proof glass, so that the facula of the calibrated laser can be observed through the target. The protective cover 16 is thinly coated or screen printed with a layer of infrared fluorescent coloring material that does not block the transmission of the calibration laser spot.

c. The power output of the laser generator 50 is adjusted to be minimum, the laser emission switch is pressed, so that the invisible laser beam passes through the calibrated flight light path and is projected on the protective cover 16 on the calibrated visible laser, and due to the color development effect of the infrared fluorescent color development material, the originally invisible laser beam can display a light spot with the diameter of 3-6mm on the protective cover 16, and the light spot has lower brightness and can meet the requirement of visual observation. At this point, the reflected light spot generated by the spot emission of one laser generator 50 and the visible light spot transmitted from within the collimated visible laser will be superimposed on the target of protective cover 16. In order to prevent the infrared color developing coating from being damaged by the laser, the time of each point shot is about 200-300 ms, but the requirement of visual inspection on the concentricity of the two light spots is met.

d. If the concentricity of the two light spots inside and outside the protective cover 16 is consistent, the accuracy of the calibrated flight light path can be judged to meet the design requirement. Otherwise, it is determined that a deviation occurs in the laser light emission angle or the installation position of the laser generator 50. The solution is to repeat the step c again to judge after the screw on the mounting seat of the laser generator 50 is finely adjusted.

Because the flight light path is calibrated, the deviation position of the light spot projected on the infrared developing material by the laser emitter and the position or angle deviation of the laser generator 50 have an equivalent relationship, if the installation height of the laser generator 50 is higher, the light beam is projected on the light spot on the protective cover 16, and vice versa, the light beam is deflected to the left and right. The angular deviation of the laser emission of the laser generator 50 is reflected by the fact that the light spot deviates from the horizontal line and the vertical line of the cross line, is projected on four quadrants divided by the cross line, and has an equivalent or mirror image relation with the angular deviation, so that the principle is mastered. The mounting position and the beam emission angle of the laser generator 50 can be adjusted to the optimum state only by 2-3 spot shots.

e. And measuring the perpendicularity of the light path from the third reflector 30 to the working surface, and accurately calibrating the perpendicularity of the light path from the third reflector 30 to the surface of the cut workpiece 40.

The calibrated visible laser 11 is removed, and then the laser emission button is pressed, so that the laser beam of the processing operation irradiates to the target material on the working surface through the third reflector 30 → the focusing lens cone → the light outlet, wherein the target material can be a hardboard or a wood board, and the perpendicularity of the section of the light path meets the requirement, the laser beam can cause a circular burning trace on the target material, and if the section of the light path is deviated in perpendicularity, no burning trace and no light emission or light emission of the part of the burning trace such as a semicircular shape, an oval shape and the like can be caused. By observing the burning trace of the point-shot target material, the fitting degree of the actual light path and the ideal light path, namely the integral accuracy of all the light paths can be judged.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a calibrating device of laser cutting machine flight light path, includes calibration laser instrument and mark target imager, its characterized in that: the calibration laser consists of a body (1), a visible light laser (11), a glass bead set screw (12), a rear cover (13), a vertical adjusting screw (14), a horizontal adjusting screw (15) and a protective cover (16);

body (1) one end is equipped with the ladder through-hole, and ladder through-hole one end is the toper, and visible light laser ware (11) one end is spherical structure, and body (1) one end sets up round hole (32), and body (1) middle part sets up flange boss 17, and flange boss 17 sets up three screw hole, and three screw hole is used for threaded connection glass pearl holding screw (12), vertical adjusting screw (14), horizontal adjusting screw (15) respectively.

2. The device for calibrating the flight path of the laser cutting machine according to claim 1, characterized in that: one end of the body (1) is in threaded connection with the rear cover (13), one end of the rear cover (13) is provided with an internal thread, and the other end of the rear cover (13) is provided with an external thread.

3. The device for calibrating the flight path of the laser cutting machine according to claim 2, characterized in that: the other end of the body (1) is in threaded connection with a protective cover (16).

4. The device for calibrating the flight path of the laser cutting machine according to claim 3, characterized in that: the protective cover (16) is provided with a target ring.

5. The device for calibrating the flight path of the laser cutting machine according to claim 1, characterized in that: the target imager is composed of a base (2), a lever arm (21), a hinge bolt (22), a target chute (23), a target slider (24), an imaging target (25), a target locking screw (26), a target chute end cover (27), a stroke fine adjustment bolt (28) and a wedge ball rotating mechanism;

base (2) upside sets up heavy groove, lever arm (21) are connected in heavy inslot through hinge bolt (22) articulated, mark target spout (23) are connected in lever arm (21) one side through hinge bolt (22) articulated, mark target slider (24) sliding connection is in mark target spout (23), formation of image mark target (25) are through mark target locking screw (26) fixed connection mark target slider (24) one side, mark target spout (23) upside fixed connection mark target spout end cover (27), stroke fine setting bolt (28) are rotated with mark target spout end cover (27) and are connected, stroke fine setting bolt (28) and mark target slider (24) threaded connection.

6. The device for calibrating the flight path of the laser cutting machine according to claim 5, wherein: wedge ball slewing mechanism includes beat adjusting screw (3), internal thread copper sheathing (31) sink the groove upside and set up round hole (32), sliding connection steel ball in round hole (32), and the lower extreme of round hole (32) sets up the slip chamber, and slip intracavity sliding connection slip post, the one end that the slip post is close to the steel ball is the inclined plane, and base (2) one side is through internal thread copper sheathing (31) threaded connection beat adjusting screw (3), and beat adjusting screw (3) one end contacts with the slip post.

7. The device for calibrating the flight path of the laser cutting machine according to claim 6, wherein: the lever arm (21) is fixedly connected with the sinking groove through a return spring (33).

8. The device for calibrating the flight path of the laser cutting machine according to claim 5, wherein: the bottom of the base (2) is fixedly connected with four magnets.

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