CN213289080U - Laser cutting head with light shield mechanism - Google Patents
Laser cutting head with light shield mechanism Download PDFInfo
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- CN213289080U CN213289080U CN202021837883.9U CN202021837883U CN213289080U CN 213289080 U CN213289080 U CN 213289080U CN 202021837883 U CN202021837883 U CN 202021837883U CN 213289080 U CN213289080 U CN 213289080U
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Abstract
The utility model discloses a laser cutting head with a light screen mechanism, which comprises an optical fiber connector, a diaphragm support and a nozzle component; the diaphragm support comprises a side wall, a top wall and a bottom wall, and a hollow cavity is defined by the side wall, the top wall and the bottom wall; the laser cutting head also comprises a light shielding plate mechanism, wherein the light shielding plate mechanism comprises a motor, a screw rod nut and a light shielding plate; the motor is arranged on the outer side of the top wall, and the screw rod is positioned on an extension line of an output shaft of the motor and is connected with the output shaft of the motor; the light screen is perpendicular to the screw rod and is fixedly connected with the screw rod nut; a shading hole is formed in the center of the shading plate; the outer layer light and the light shielding plate of the main light beam are intentionally contacted through the coaxial movement of the light shielding plate mechanism and the light beam shaft, so that the outer layer light is removed, the light beam quality is improved, and high-quality and stable laser processing is realized.
Description
Technical Field
The utility model relates to a laser pipe cutting field especially relates to a take laser cutting head of shading plate mechanism.
Background
The laser cutting is to focus the 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. With the relative position movement of the light beam and the workpiece, the material is finally formed into a cutting seam, so that the purpose of cutting is achieved, and the method is widely applied to various metal industries.
The quality of laser cutting is unstable, the cutting surface is rough, and continuous cutting is unstable, which is always the biggest problem of laser cutting, and the main reasons are that factors influencing the cutting quality are excessive, such as process-related factors including a focus position, a nozzle caliber, laser power, pulse frequency and the like, and outer layer light of a main light beam is also an important factor influencing poor cutting or instability. But at present, the outer layer light of the main light is basically not processed. The quality control of the cutting surface can only be stopped on process debugging, so that the quality debugging change of the cutting surface is limited.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a take laser cutting head of gobo mechanism through being provided with the gobo mechanism on laser cutting head, this gobo mechanism can carry out effectual getting rid of to outer light to can promote the light beam quality and change the cutting badly, realize the laser cutting of high-quality, concrete content as follows:
the device comprises an optical fiber connector, a diaphragm support and a nozzle assembly; the optical fiber connector, the diaphragm support and the nozzle assembly are fixedly connected in sequence; the diaphragm support comprises a side wall, a top wall and a bottom wall, and a hollow cavity is defined by the side wall, the top wall and the bottom wall; the laser cutting head also comprises a light shielding plate mechanism, wherein the light shielding plate mechanism comprises a motor, a screw rod nut and a light shielding plate; the motor is arranged on the outer side of the top wall, and the screw rod, the screw rod nut and the light screen are all accommodated in the hollow cavity; the screw rod is positioned on an extension line of an output shaft of the motor and is connected with the output shaft of the motor; the light screen is perpendicular to the screw rod and is fixedly connected with the screw rod nut; and a shading hole is formed in the center of the shading plate.
Preferably, the light screen assembly further comprises a coupler, one end of the coupler is connected with the output shaft of the motor, and the other end of the coupler is connected with the screw rod.
Preferably, a rounded corner is provided at an end of the light shielding hole facing the optical fiber connector.
Preferably, sliding blocks are fixedly arranged on the left side and the right side of the light shielding plate, sliding grooves are formed in the side walls of the diaphragm support, and the sliding blocks slide in the sliding grooves.
Preferably, the screw rod nut comprises a vertical connecting part and a horizontal mounting part, the vertical connecting part is in a hollow cylinder shape, and the horizontal mounting part is in an annular shape; vertical connecting portion and horizontal installation department integrated into one piece, the light screen is installed on the horizontal installation department.
Preferably, a groove structure is arranged on the horizontal installation part, a convex structure is arranged on the light screen, and the groove structure and the convex structure are matched and positioned.
Preferably, be provided with the motor mounting panel on the motor be provided with the through-hole on the motor mounting panel be provided with the screw hole on the roof of diaphragm support, the retaining member passes behind the through-hole with screw hole cooperation locking.
Preferably, a positioning groove is formed in the outer side of the top wall of the diaphragm support, and the motor mounting plate is accommodated in the positioning groove.
The utility model has the advantages that:
the utility model is provided with a shading plate mechanism on the diaphragm support, and the shading plate mechanism is movable; the outer layer light and the light shielding plate of the main light beam are intentionally contacted through the coaxial movement of the light shielding plate mechanism and the light beam shaft, so that the outer layer light is removed, the light beam quality is improved, and high-quality and stable laser processing is realized.
Drawings
Fig. 1 is a cross-sectional view of a laser cutting head of the present invention;
FIG. 2 is a block diagram of the shutter mechanism of FIG. 1;
fig. 3 is a graph showing the variation of the divergence angle of the laser according to the relative emission power of the laser according to the present invention;
FIG. 4 is a schematic illustration of the divergence angle of the laser light;
fig. 5 is a schematic diagram showing the change of the light quantity according to the distance change of the light shielding plate.
The technical features indicated by the reference numerals in the drawings are as follows:
1. an optical fiber splice; 2. a diaphragm support; 2.1, side walls; 2.2, a top wall; 2.3, bottom wall; 3. a nozzle assembly; 3.1, a beam expanding lens mounting seat; 3.2, a focusing lens mounting seat; 3.3, a protective lens mounting seat; 3.4, a nozzle; 4. a hollow cavity; 4.1, a first cavity; 4.2, a second cavity; 5. a shutter mechanism; 5.1, a motor; 5.2, a screw rod; 5.3, a screw nut; 5.4, a light screen; 5.5, a coupler.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
in this embodiment, the "up", "down", "left" and "right" refer to the "up", "down", "left" and "right" around the laser cutting head when the laser cutting head is normally installed.
The laser cutting head with the shutter mechanism as shown in fig. 1 comprises an optical fiber connector 1, a diaphragm support 2 and a nozzle assembly 3; the optical fiber connector 1, the diaphragm support 2 and the nozzle assembly 3 are fixedly connected in sequence; the nozzle assembly 3 comprises a beam expanding lens mounting seat 3.1, a focusing lens mounting seat 3.2, a protective lens mounting seat 3.3 and a nozzle 3.4; the beam expanding lens mounting seat 3.1, the focusing lens mounting seat 3.2, the protection lens mounting seat 3.3 and the nozzle 3.4 are fixedly connected in sequence, and the beam expanding lens mounting seat 3.1, the focusing lens mounting seat 3.2, the protection lens mounting seat 3.3 and the nozzle 3.4 are components of a conventional laser cutting head and are not repeated herein. In the utility model, the diaphragm support 2 comprises a side wall 2.1, a top wall 2.2 and a bottom wall 2.3, the side wall 2.1, the top wall 2.2 and the bottom wall 2.3 enclose a hollow cavity 4, and the hollow cavity 4 comprises a first cavity 4.1 and a second cavity 4.2; the first cavity 4.1 is communicated with the second cavity 4.2; the first cavity 4.1 is provided with an upper opening and a lower opening, the upper opening is matched with the optical fiber connector 1, the lower opening is matched with the nozzle assembly 3, the central axis of the first cavity 4.1 is coaxial with the central axis of the light beam, and the first cavity 4.1 is used for accommodating the light beam to pass through; the side wall 2.1, the top wall 2.2 and the bottom wall 2.3 of the diaphragm support 2 enclose the second cavity 4.2, the second cavity 4.2 is provided with an opening, the opening of the second cavity 4.2 is communicated with the first cavity 4.1, and the second cavity 4.2 is used for accommodating the light shielding plate mechanism 5.
The laser cutting head also comprises a light shielding plate mechanism 5, wherein the light shielding plate mechanism 5 comprises a motor 5.1, a screw rod 5.2, a screw rod nut 5.3 and a light shielding plate 5.4; the motor 5.1 is installed on the outer side of the top wall 2.2, the outer side of the top wall 2.2 refers to one side of the top wall 2.2 deviating from the second cavity 4.2, the screw rod 5.2, the screw rod nut 5.3 and the light screen 5.4 are all accommodated in the hollow cavity 4, the screw rod 5.2 is located on an extension line of an output shaft of the motor 5.1 and is connected with the output shaft of the motor 5.1, preferably, a coupler 5.5 is arranged between the output shaft of the motor 5.1 and the screw rod 5.2, one end of the coupler 5.5 is connected with the output shaft of the motor 5.1, and the other end of the coupler 5.5 is connected with the screw rod 5.2; the light screen 5.4 is perpendicular to the screw rod 5.2 and is fixedly connected with the screw rod nut 5.3; a shading hole is arranged in the center of the shading plate 5.4. When the motor 5.1 is started, the output shaft of the motor 5.1 can rotate to drive the screw rod 5.2 to rotate, the screw rod 5.2 can rotate to drive the screw rod nut 5.3 to move along the screw rod 5.2, and the light screen 5.4 can be driven to move along the screw rod 5.2 when the motor 5.1 is started as the light screen 5.4 is fixedly connected with the screw rod nut 5.3.
The central axis of shading hole is coaxial with the central axis of light beam to shading hole's orientation fiber splice 1's one end is provided with the radius angle structure, and the purpose of setting up the radius angle is in order to increase the photic area, and the shading hole of the same size can pass through if set up the light that the chamfer angle structure has followed. Through with the coaxial removal of light screen mechanism 5 and beam axis, intentionally let the contact of the outer light sum light screen 5.4 of main beam, realize the removal to outer light to promote the light beam quality, realize high-quality and stable laser beam machining.
In order to ensure that the movement of the light screen 5.4 is more stable, sliding blocks (not shown in the figure) are fixedly arranged on the left side and the right side of the light screen 5.4, and sliding grooves (not shown in the figure) are arranged on the side wall 2.1 of the diaphragm support 2 and slide in the sliding grooves, so that the movement of the light screen 5.4 is more stable, and the light screen cannot shake.
As shown, the feed screw nut 5.3 comprises a vertical connecting portion 5.3.1 and a horizontal mounting portion 5.3.2, the vertical connecting part 5.3.1 is in a hollow cylinder shape, the horizontal mounting part 5.3.2 is in an annular shape, the vertical connecting part 5.3.1 and the horizontal mounting part 5.3.2 are integrally formed, the inner walls of the vertical connecting part 5.3.1 and the horizontal mounting part 5.3.2 are provided with thread structures, the thread structure is used for matching with the screw rod 5.2, the light screen 5.4 is arranged on the horizontal installation part 5.3.2, this arrangement facilitates the mounting of the visor 5.4, and to further facilitate the mounting of the visor 5.4, a groove structure is arranged on the horizontal mounting part 5.3.2, a convex structure is arranged on the light screen 5.4, the groove structure and the protruding structure are matched and positioned, so that the shading plate 5.4 and the horizontal mounting part 5.3.2 can be pre-positioned firstly when being mounted.
Be provided with the motor mounting panel on the motor 5.1 be provided with the through-hole on the motor mounting panel be provided with the screw hole on the roof 2.2 of diaphragm support 2, the retaining member passes behind the through-hole with screw hole cooperation locking. The purpose of so setting up is for the convenience of the installation of motor, and the mounting means of conventional motor is to be provided with the screw hole on the terminal surface of motor, and the retaining member cooperates the locking with the screw hole of the terminal surface on the motor, but in this embodiment, according to the inconvenient installation of the mounting means of conventional motor, so in this embodiment, be provided with the motor mounting panel on motor 5.1 solves the inconvenient problem of installing of motor. The motor mounting panel is ring shape, ring shape motor mounting panel with motor 5.1 fixed connection, it is preferred, ring shape motor mounting panel with the integrative stamping forming of motor 5.1's shell. The outside of the roof 2.2 of diaphragm support 2 is provided with the constant head tank, the motor mounting panel holds in the constant head tank. Through with the motor mounting panel holds in the constant head tank for the installation of motor mounting panel is more firm.
The utility model discloses laser cutting head's laser beam machining method includes following step:
s1: establishing a first database in which the relative laser emission power and the outer layer light divergence angle are in one-to-one correspondence;
s2: establishing a second database in one-to-one correspondence between the outer layer light divergence angle of the laser and the target moving distance of the light shielding plate 5.4;
s3: in the actual cutting process, the shading plate 5.4 is firstly adjusted to the initial position; then, according to the power of the laser, divergence angle data of the outer layer light is obtained by using a first database, and a target moving distance of the light shielding plate 5.4 is obtained by using a second database according to the divergence angle data of the outer layer light;
s4: starting a motor, moving the light screen 5.4 to a target moving distance, and then closing the motor;
s5: and cutting the target object.
Preferably, in step S1, a discrete first database is first established, and a continuous first database is obtained by using an interpolation algorithm according to the discrete database.
Preferably, in step S2, for a specific outer layer light divergence angle, the light shielding plate 5.4 is moved to different positions to obtain different cutting effects, so as to find the target moving distance of the light shielding plate 5.4 when the cutting effect is the best; and so on, the target moving distance of the light shielding plate 5.4 corresponding to different outer layer light divergence angles is obtained.
As shown in fig. 4, a represents the optical fiber, NA represents the divergence angle of the laser light, and NA varies in the range of 0.03 to 0.17. The divergence angle of the laser can slightly change along with the power difference of the laser, the change can be ignored in the practical application process, and the divergence angle of the laser is only related to the relative output power of the laser and changes along with the change of the relative output power of the laser. FIG. 3 illustrates a 4KW laser, with the abscissa the divergence angle of the laser's outer layer light and the ordinate the relative power emitted by the laser; different curves represent different output powers of the same laser, 2V represents 20% output power (namely 0.8KW), 6V represents 60% output power (namely 4.8KW), 10V represents 100% output power (namely 4KW), 2V, 6V and 10V represent different output powers of the 4KW laser, the energy density of the laser is changed among different output powers, and the difference among divergence angles of the laser is small; the divergence angle of the laser light is only related to the ordinate (laser relative emission power), i.e.: also at 2V, there is a large variation between the divergence angles of the laser light as the relative emitted power of the laser light varies.
As shown in fig. 5, when the light shielding plate 5.4 moves, the outer layer light of the main beam can contact with the light shielding plate 5.4, so as to remove the outer layer light, thereby realizing stable and high-quality laser cutting. Different light screen 5.4 positions correspond different cutting effects, move light screen 5.4 to different positions, look over the effect after the cutting to find the most suitable light screen 5.4's position.
Therefore, first, a first database in one-to-one correspondence between the relative laser emission power and the outer layer light divergence angle needs to be established, and then a second database in one-to-one correspondence between the outer layer light divergence angle of the laser and the target moving distance of the light shielding plate 5.4 is established; in the actual use process, after the control system reads the relative output power of the laser, finding out the corresponding laser divergence angle from the first database; then finding out the target moving distance of the light shielding plate 5.4 from a second database through the laser divergence angle data, moving the light shielding plate 5.4 according to the target moving distance of the light shielding plate 5.4, and finally carrying out laser cutting. It should be noted that after each cut, the shutter 5.4 needs to be moved to the initial position for the next cut.
It is right above that the utility model provides a take laser cutting head of shutter mechanism's embodiment has explained in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can also make several improvements and modifications, and these improvements and modifications also fall into the protection scope of the claims of the present invention.
Claims (8)
1. A laser cutting head with a light shield mechanism comprises an optical fiber connector, a diaphragm support and a nozzle assembly; the optical fiber connector, the diaphragm support and the nozzle assembly are fixedly connected in sequence; the method is characterized in that: the diaphragm support comprises a side wall, a top wall and a bottom wall, and a hollow cavity is defined by the side wall, the top wall and the bottom wall; the laser cutting head also comprises a light shielding plate mechanism, wherein the light shielding plate mechanism comprises a motor, a screw rod nut and a light shielding plate; the motor is arranged on the outer side of the top wall, and the screw rod, the screw rod nut and the light screen are all accommodated in the hollow cavity; the screw rod is positioned on an extension line of an output shaft of the motor and is connected with the output shaft of the motor; the light screen is perpendicular to the screw rod and is fixedly connected with the screw rod nut; and a shading hole is formed in the center of the shading plate.
2. The laser cutting head with the shutter mechanism according to claim 1, wherein: the shading plate assembly further comprises a coupler, one end of the coupler is connected with an output shaft of the motor, and the other end of the coupler is connected with the lead screw.
3. The laser cutting head with the shutter mechanism according to claim 1, wherein: and a rounded corner is arranged at one end of the shading hole facing the optical fiber connector.
4. The laser cutting head with the shutter mechanism according to claim 1, wherein: the left side and the right side of the light screen are fixedly provided with sliding blocks, the side wall of the diaphragm support is provided with a sliding groove, and the sliding blocks slide in the sliding grooves.
5. The laser cutting head with the shutter mechanism according to claim 1, wherein: the screw rod nut comprises a vertical connecting part and a horizontal mounting part, the vertical connecting part is in a hollow cylinder shape, and the horizontal mounting part is in an annular shape; vertical connecting portion and horizontal installation department integrated into one piece, the light screen is installed on the horizontal installation department.
6. The laser cutting head with the shutter mechanism according to claim 5, wherein: the light screen is characterized in that a groove structure is arranged on the horizontal installation part, a protrusion structure is arranged on the light screen, and the groove structure and the protrusion structure are matched and positioned.
7. The laser cutting head with the shutter mechanism according to claim 1, wherein: be provided with the motor mounting panel on the motor be provided with the through-hole on the motor mounting panel be provided with the screw hole on the roof of diaphragm support, the retaining member passes behind the through-hole with screw hole cooperation locking.
8. The laser cutting head with the shutter mechanism according to claim 7, wherein: the outside of the roof of diaphragm support is provided with the constant head tank, the motor mounting panel holds in the constant head tank.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019218742165 | 2019-10-31 | ||
| CN201921874216 | 2019-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213289080U true CN213289080U (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021837883.9U Active CN213289080U (en) | 2019-10-31 | 2020-08-28 | Laser cutting head with light shield mechanism |
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| Country | Link |
|---|---|
| CN (1) | CN213289080U (en) |
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2020
- 2020-08-28 CN CN202021837883.9U patent/CN213289080U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 528311 No. 4 Anye Road, Shunjiang Community Industrial Park, Beijiao Town, Shunde District, Foshan City, Guangdong Province Patentee after: Guangdong Hongshi Laser Technology Co.,Ltd. Address before: 528311 Beijiao Town, Shunde District, Foshan, Guangdong, Beijiao, 8, two Pearl River Road, industrial park, Patentee before: Guangdong Hongshi Laser Technology Co.,Ltd. |