CN114918528B

CN114918528B - Laser gun head of industrial laser robot

Info

Publication number: CN114918528B
Application number: CN202210533861.0A
Authority: CN
Inventors: 杨勇; 杨波
Original assignee: Xuzhou Xiaer Intelligent Welding Research Institute Co ltd
Current assignee: Jiangsu Runyang Auto Parts Manufacturing Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-12-30
Anticipated expiration: 2042-05-17
Also published as: CN114918528A

Abstract

The invention relates to the technical field of laser welding equipment, and discloses a laser gun head of an industrial laser robot, which comprises a fixed shell 1 and a robot, wherein a motor is fixedly installed in the front end of the robot, the top of the fixed shell is fixedly connected with a driving arm of the robot, and the inner space of the fixed shell is divided into an upper space and a lower space. Through the setting of right laser head and left laser head, make right laser head and left laser head emit light respectively, after the focus of focusing lens, gather mutually on the work piece, weld the work piece jointly, the equal slant of the light beam that right laser head and left laser head sent shoots on the work piece, the facula that event every light beam formed all is greater than the spot area of vertical irradiation on the work piece, nevertheless because right laser head and left laser head symmetry set up, facula between them coincide each other, and complementary, effectively compensate the not enough of the power area that the facula area grow caused, and then effectively accomplish weldment work.

Description

Laser gun head of industrial laser robot

Technical Field

The invention relates to the technical field of laser welding equipment, in particular to a laser gun head of an industrial laser robot.

Background

The laser processing robot is applied to the laser processing with the robot technology, realize more flexible laser processing operation through high accuracy industrial robot, this system carries out online operation through the teach box, also can program through the off-line mode, the system is through the automated inspection to processing the work piece, produce the model of machined part, generate the processing curve then, also can utilize CAD data direct processing, can be used to the laser surface treatment of work piece, punch, welding and mould restoration etc. but apply to industrial laser robot at present and go up the laser rifle head and have some inadequacies, as follows:

in the welding process, when a light beam irradiated on a joint is blocked by a workpiece or an adjacent clamp, a welding angle must be adjusted, when the light beam needs to be incident at a certain angle, the spot area on the surface of the workpiece can be increased, the power density is reduced, even if the welding speed is ensured to be unchanged, the penetration can be reduced, and the welding or cutting quality is influenced.

Disclosure of Invention

The invention provides a laser gun head of an industrial laser robot, which has the advantages of good welding effect, large deflection angle and long service life and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides an industry laser robot's laser gun head, includes fixed shell and robot, the inside fixed mounting in front end of robot has the motor, the top of fixed shell and the actuating arm fixed connection of robot, the inner space of fixed shell divide into upper portion space and lower part space, the central siphon has been cup jointed in the activity of fixed shell middle part, the fixed movable mounting dish that has cup jointed on the central siphon just is located the inside in lower part space, the light trap has evenly been seted up to the inside of movable mounting dish, the inside fixed mounting who just is located the light trap on the movable mounting dish has focusing lens, the top bilateral symmetry fixed mounting who just is located the movable mounting dish on the fixed shell has the dog of hiding, the top symmetry fixed mounting who just is located focusing lens on the dog has right laser head and left laser head, the light that right laser head and left laser head transmitted is crossing the gathering in the below of central siphon behind focusing lens focus.

Preferably, the light rays emitted by the right laser head and the left laser head are splayed, and the included angle between the right laser head and the left laser head is 20-40 degrees.

Preferably, the top of central siphon just is located the top of fixed housing and the inside motor output shaft fixed connection of actuating arm, hide the bottom surface of dog and the upper surface swing joint of light trap, two hide the cover of dog to the light trap below right laser head and left laser head respectively.

Preferably, the last and the place ahead fixed mounting who is located the central siphon of fixed shell has the cooling tube, the bottom of cooling tube and the lower part space intercommunication that is located the movable mounting dish top, the other end of cooling tube is connected with the gas transmission pump, the cooling tube divide into intake pipe and outlet duct.

Preferably, the suction hole has been seted up to the inside of central siphon, fixed housing is last and is located upper portion space fixed mounting has the air guide sleeve, the air guide sleeve cup joints with the central siphon activity, the through-hole has been seted up to the inside that just is located the air guide sleeve on the central siphon, the air guide sleeve is located the outside one end of fixed housing and has the vacuum pump through the trachea intercommunication.

Preferably, the number of the focusing lenses is 4, 6 or 8.

The invention has the following beneficial effects:

1. through the arrangement of the right laser head and the left laser head, light rays are respectively emitted by the right laser head and the left laser head, and then the light rays are focused by the focusing lens and are converged on a workpiece to weld the workpiece together, light beams emitted by the right laser head and the left laser head are obliquely irradiated on the workpiece, so that light spots formed by each light beam are larger than the area of light spots vertically irradiated on the workpiece, but because the right laser head and the left laser head are symmetrically arranged, the light spots of the right laser head and the left laser head are overlapped and are complementary to each other, the defect of power area caused by the fact that the area of the light spots is enlarged is effectively made up, and then welding work is effectively finished.

2. Through the setting of central siphon and focusing lens, make can carry out periodic conversion to the focusing lens of right laser head and left laser head below, avoid the light beam to utilize a focusing lens to focus for a long time, cause focusing lens to be heated and burst, the life of extension focusing lens, and simultaneously, the metal steam that rises to two laser beams through the central siphon pumps, avoid the metal steam to rise on the one hand and block the propagation of light beam, influence the power of laser, on the other hand, directly clear away the metal steam suction, avoid the metal steam to rise, the adhesion is to focusing lens's lower surface, lead to focusing lens to damage.

Drawings

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic front view and a half sectional view of the structure of the present invention;

FIG. 3 is a schematic diagram of the operation of the optical path of the structure of the present invention;

FIG. 4 is a schematic side view of the structure of the present invention;

FIG. 5 is a schematic top view of a structural stop of the present invention;

FIG. 6 is a schematic top view of a focusing lens arrangement according to the present invention.

In the figure: 1. fixing the housing; 2. an axle tube; 3. an upper space; 4. a lower space; 5. a movable mounting plate; 6. a light-transmitting hole; 7. a focusing lens; 8. a stop block is shielded; 9. a cooling tube; 10. an air guide sleeve; 11. a right laser head; 12. a left laser head; 13. and (5) a workpiece.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-3, a laser gun head of an industrial laser robot includes a fixed housing 1 and a robot, a motor is fixedly installed inside the front end of the robot, the top of the fixed housing 1 is fixedly connected with a driving arm of the robot, the inner space of the fixed housing 1 is divided into an upper space 3 and a lower space 4, a shaft tube 2 is movably sleeved in the middle of the fixed housing 1, a movable mounting plate 5 is fixedly sleeved inside the shaft tube 2 and located in the lower space 4, light holes 6 are uniformly formed inside the movable mounting plate 5, a focusing lens 7 is fixedly installed on the movable mounting plate 5 and located in the light holes 6, blocking blocks 8 are fixedly installed on the fixed housing 1 and located above the movable mounting plate 5 in a bilateral symmetry manner, a right laser head 11 and a left laser head 12 are fixedly installed on the blocking blocks 8 and located above the focusing lens 7 in a symmetry manner, light rays emitted by the right laser head 11 and the left laser head 12 are focused by the focusing lens 7 and then are intersected and converged below the shaft tube 2, the fixed shell 1 is carried to a position right above a workpiece 13 through a robot, then the right laser head 11 and the left laser head 12 respectively emit light rays, then the light rays are focused by the focusing lens 7 and converged on the workpiece 13 to weld the workpiece 13 together, and light beams emitted by the right laser head 11 and the left laser head 12 are obliquely irradiated on the workpiece 13, so that light spots formed by the light beams are larger than the area of light spots vertically irradiated on the workpiece 13, but the right laser head 11 and the left laser head 12 are symmetrically arranged, the light spots of the two light spots are overlapped and complemented with each other, the defect of power area caused by the enlarged light spot area is effectively made up, and then the welding work is effectively completed; the light emitted by the right laser head 11 and the left laser head 12 is splayed, and the included angle between the light and the light is 20-40 degrees, when the light beam irradiated on the joint is blocked by a workpiece or an adjacent clamp, when the welding angle is adjusted, when the fixed shell 1 deflects rightwards, the light spot irradiated on the workpiece 13 by the right laser head 11 is gradually increased, the light spot irradiated on the workpiece 13 by the left laser head 12 is gradually decreased, the power area is increased, and the light spot and the power area are matched with each other, so that the angle which can be deflected by robot welding can be enlarged, and the defect of the power area during welding during deflection is avoided, and the instruction and the speed of welding are influenced;

referring to fig. 3-6, the top end of the shaft tube 2 and the top of the fixed housing 1 are fixedly connected to the output shaft of the motor inside the driving arm, the bottom surface of the shielding block 8 is movably connected to the upper surface of the light-transmitting hole 6, the two shielding blocks 8 respectively cover the light-transmitting holes 6 below the right laser head 11 and the left laser head 12, the shaft tube 2 is driven by the motor to periodically rotate, and after welding for a certain time, the shaft tube rotates by a certain angle to drive the movable mounting plate 5 to replace the focusing lens 7 below the right laser head 11 and the left laser head 12, so as to prevent the focusing lens 7 from being heated and burst due to long-time irradiation of light beams on the focusing lens 7; a cooling pipe 9 is fixedly arranged on the fixed shell 1 and in front of the shaft tube 2, the bottom end of the cooling pipe 9 is communicated with the lower space 4 above the movable mounting disc 5, the other end of the cooling pipe 9 is connected with an air delivery pump, the cooling pipe 9 is divided into an air inlet pipe and an air outlet pipe, nitrogen is input into the lower space 4 through the air delivery pump to cool the replaced focusing lens 7, meanwhile, the blocking block 8 can isolate the focusing lens 7 below the right laser head 11 and the left laser head 12, the blocking of the diffraction of light beams caused by turbulent air flow entering the lower space 4 is avoided, the power of the light beams finally irradiating the workpiece 13 is improved, and the welding speed is improved; an air suction hole is formed in the shaft tube 2, an air guide sleeve 10 is fixedly installed on the fixed shell 1 and located in the upper space 3, the air guide sleeve 10 is movably sleeved with the shaft tube 2, a through hole is formed in the shaft tube 2 and located in the air guide sleeve 10, one end, located outside the fixed shell 1, of the air guide sleeve 10 is communicated with a vacuum pump through an air tube, the vacuum pump sucks the inner cavity of the shaft tube 2 through the air guide sleeve 10 to generate vacuum, then the shaft tube 2 sucks air around a welding point on the workpiece 13 through internal negative pressure, metal steam formed by laser melting of the workpiece 13 rises vertically between two laser beams during welding, on one hand, the phenomenon that the metal steam rises to block the propagation of the beams and influence the power of laser is avoided, on the other hand, the metal steam is directly sucked and removed, the phenomenon that the metal steam rises to be adhered to the lower surface of the focusing lens 7 and damage the focusing lens 7 is avoided; the number of the focusing lenses 7 is 4, 6 or 8, since the right laser head 11 and the left laser head 12 are symmetrically arranged, and for the convenience of replacement, the number of the focusing lenses 7 is a double number, and is at least 4.

The working principle is that the fixed shell 1 is carried to the position right above a workpiece 13 through a robot, then light beams are respectively emitted by a right laser head 11 and a left laser head 12, and then the light beams are focused by a focusing lens 7 and converged on the workpiece 13 to weld the workpiece 13 together, light beams emitted by the right laser head 11 and the left laser head 12 are obliquely emitted on the workpiece 13, so that light spots formed by each light beam are larger than the area of light spots vertically irradiated on the workpiece 13, but the right laser head 11 and the left laser head 12 are symmetrically arranged, the light spots of the two laser heads are mutually overlapped to weld the workpiece 13, in the process, an axle tube 2 can be driven by a motor to periodically rotate, after welding for a certain time, a certain angle of rotation is carried out to drive a movable mounting disc 5 to replace the focusing lens 7 below the right laser head 11 and the left laser head 12, nitrogen is input into a lower space 4 through a gas transmission pump to cool the replaced focusing lens 7, a vacuum pump sucks the inner cavity of the axle tube 2 through a gas guide sleeve 10 to generate vacuum, then the vacuum is generated, air on the welding point on the workpiece 13 is sucked through negative pressure inside the air, and the welding point, when the welding of the two workpieces is welded, the metal axle tube 2, and the metal beam is melted to form a steam-melting laser beam, and the metal-up tube 2;

when the light beam irradiated on the joint is blocked by the workpiece or an adjacent clamp, when the welding angle is adjusted, when the fixed shell 1 deflects towards the right, the light spot irradiated on the workpiece 13 by the right laser head 11 is gradually enlarged, the light spot irradiated on the workpiece 13 by the left laser head 12 is gradually reduced, the power area is increased, and the two parts are matched with each other to jointly complete the welding task.

It is noted that, herein, relational terms such as first and second, and the like may be 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.

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

1. The utility model provides an industry laser robot's laser gun head, includes fixed shell (1) and robot, the inside fixed mounting of front end of robot has the motor, the top of fixed shell (1) and the actuating arm fixed connection of robot, its characterized in that: the inner space of the fixed shell (1) is divided into an upper space (3) and a lower space (4), the middle part of the fixed shell (1) is movably sleeved with an axle tube (2), the inner part of the axle tube (2) which is positioned in the lower space (4) is fixedly sleeved with a movable mounting disc (5), the inner part of the movable mounting disc (5) is uniformly provided with a light transmission hole (6), the movable mounting disc (5) is provided with a focusing lens (7) which is positioned in the light transmission hole (6), the fixed shell (1) is provided with a shielding block (8) which is positioned above the movable mounting disc (5) in a bilateral symmetry mode, the shielding block (8) is provided with a right laser head (11) and a left laser head (12) which are positioned above the focusing lens (7) in a symmetrical and fixed mode, and light emitted by the right laser head (11) and the left laser head (12) is focused by the focusing lens (7) and then is converged below the axle tube (2);

the suction hole has been seted up to the inside of central siphon (2), fixed housing (1) is gone up and is arranged in upper portion space (3) fixed mounting has air guide sleeve (10), air guide sleeve (10) cup joint with central siphon (2) activity, the through-hole has been seted up to the inside that just is located air guide sleeve (10) on central siphon (2), air guide sleeve (10) are located the outside one end of fixed housing (1) and have the vacuum pump through the trachea intercommunication.

2. The laser gun head of an industrial laser robot according to claim 1, characterized in that: the light rays emitted by the right laser head (11) and the left laser head (12) are splayed, and the included angle between the right laser head and the left laser head is 20-40 degrees.

3. The laser gun head of an industrial laser robot according to claim 1, characterized in that: the top of central siphon (2) just is located the top of fixed shell (1) and the inside motor output shaft fixed connection of actuating arm, hide the bottom surface of dog (8) and the upper surface swing joint of light trap (6), two hide dog (8) respectively to the cover of light trap (6) of right laser head (11) and left laser head (12) below.

4. The laser gun head of an industrial laser robot according to claim 1, characterized in that: the utility model discloses a cooling device, including fixed shell (1), the place ahead fixed mounting who just is located central siphon (2) has cooling tube (9) on fixed shell (1), the bottom of cooling tube (9) and lower part space (4) intercommunication that are located movable mounting dish (5) top, the other end of cooling tube (9) is connected with the air delivery pump, cooling tube (9) divide into intake pipe and outlet duct.

5. The laser gun head of an industrial laser robot according to claim 1, characterized in that: the number of the focusing lenses (7) is 4, 6 or 8.