CN-117655353-B - Blowing control method, blowing control system and laser printing equipment

CN117655353BCN 117655353 BCN117655353 BCN 117655353BCN-117655353-B

Abstract

The application discloses a blowing control method, a blowing control system and laser printing equipment, wherein the blowing control method comprises the steps of analyzing printing data of the laser printing equipment to form an air path control strategy, adjusting blowing angles of a plurality of blowing channels and air suction angles of a plurality of air suction channels based on the air path control strategy to form a plurality of air path channels, monitoring laser paths and position information in the laser printing equipment in real time by using a detection camera to obtain detection information, updating the air path control strategy according to the detection information, and enabling a plurality of laser beams on each printing layer to be respectively located in independent air path channels by the air path control strategy. By the air blowing control method, a plurality of laser beams are respectively positioned in the independent air passage channels, and smoke dust generated by sintering each laser beam is discharged along the air passage channel where the laser beams are positioned, so that laser beams in other air passage channels cannot be shielded, the smoke dust generated by sintering the laser beams at the upper air opening is prevented from shielding laser beams at the lower air opening, and the printing quality is improved.

Inventors

WEI BING
ZHU CHAO
YANG HONGTAO
Qiu Yumen
ZHANG SHIHONG
Hong Chentou

Assignees

富联裕展科技(深圳)有限公司

Dates

Publication Date: 20260512
Application Date: 20231226

Claims (12)

1. The blowing control method is applied to laser printing equipment, and is characterized by comprising a blowing module, an air suction module, a processing module and a detection camera, wherein the blowing module comprises a plurality of blowing channels with adjustable angles, the air suction module comprises a plurality of air suction channels with adjustable angles, and the processing module is used for analyzing data and controlling the blowing and air suction angles of the blowing module and the air suction module, and the blowing control method comprises the following steps: analyzing printing data of the laser printing equipment to form an air path control strategy, wherein the printing data comprises tracks and position information of multiple laser running of each printing layer; adjusting the air blowing angles of a plurality of air blowing channels and the air suction angles of a plurality of air suction channels based on the air channel control strategy to form a plurality of air channel channels; Monitoring laser paths and position information in the laser printing equipment in real time by using the detection camera to obtain detection information; Updating the wind path control strategy according to the detection information; the air path control strategy is used for enabling a plurality of laser beams on each printing layer to be respectively located in the independent air path channels, so that only one laser beam is located in each independent air path channel.
2. The method of claim 1, wherein analyzing print data of the laser printing device to form a wind path control strategy comprises: acquiring the track and position information of the operation of a plurality of laser beams of each printing layer in the printing data; analyzing the running track and position information of a plurality of laser beams in each printing layer, and calculating the most suitable blowing and sucking angle of each air path channel so that each laser beam is positioned in an independent air path channel; and forming the air path control strategy based on the most suitable blowing and sucking angles of each air path channel.
3. The method of claim 1, wherein the plurality of air blowing channels are divided into a first air blowing portion and a second air blowing portion by a bisector, each of the first air blowing portion and the second air blowing portion including three air blowing channels, and the air path control strategy includes making the air blowing angles of the air blowing channels of the first air blowing portion and the second air blowing portion satisfy the following conditional expression: If it is θ 1 <90°,ψ 1 =(180-θ 1 )/2,ψ 2 =ψ 1 +(90-ψ 1 )/3,ψ 3 =ψ 1 +2(90-ψ 1 )/3; If it is θ 1 >90°,ψ 3 =(180-θ 1 )/2+90°,ψ 2 =ψ 3 +(90-ψ 3 ）/3,ψ 1 =ψ 3 +2（90-ψ 3 ）/3; If it is θ 2 <90°,ψ 4 =(180-θ 2 )/2,ψ 5 =ψ 4 +(90-ψ 4 )/3,ψ 6 =ψ 4 +2(90-ψ 4 )/3; If it is θ 2 >90°,ψ 6 =(180-θ 2 )/2+90°,ψ 5 =ψ 6 +(90-ψ 6 ）/3,ψ 4 =ψ 6 +2（90-ψ 6 ）/3; Wherein θ 1 is an angle between a line connecting the laser located at the left side of the upper tuyere and the laser located at the left side of the lower tuyere and a center line, wherein the center line is perpendicular to the bisector, ψ 1 、ψ 2 、ψ 3 is a blowing angle of three blowing channels gradually approaching the bisector in the first blowing portion, θ 2 is an angle between a line connecting the laser located at the right side of the upper tuyere and the laser located at the right side of the lower tuyere and the center line, and ψ 6 、ψ 5 、ψ 4 is a blowing angle of three blowing channels gradually approaching the bisector in the second blowing portion.
4. A blowing control method according to claim 3, wherein a plurality of said suction passages are divided into a first suction portion and a second suction portion by said bisector, each of said first suction portion and said second suction portion including three said suction passages, said wind path control strategy further comprising making suction angles of said suction passages of said first suction portion and said second suction portion satisfy the following conditional expression: ψ 7 =ψ 6 ,ψ 8 =ψ 5 ,ψ 9 =ψ 4 ,ψ 10 =ψ 3 ,ψ 11 =ψ 2 ,ψ 12 =ψ 1 ; Wherein, phi 7 、ψ 8 、ψ 9 is the suction angles of the three suction channels in the first suction part, which are gradually close to the bisector, and phi 12 、ψ 11 、ψ 10 is the suction angles of the three suction channels in the second suction part, which are gradually close to the bisector.
5. A blowing control method according to claim 3, wherein said updating the air path control strategy based on the detection information includes: judging whether the air blowing and sucking effect of the air path channel meets the requirement or not according to the detection information; if the requirements are not met, adjusting the blowing and sucking angles of the air passage comprises the following steps: when the air blowing angle of the air blowing channel is smaller than 90 degrees, reducing the air blowing angle of the air blowing channel by a preset range, and correspondingly adjusting the air suction angle of the corresponding air suction channel according to the adjusted air blowing angle of the air blowing channel; When the air blowing angle of the air blowing channel is larger than 90 degrees, the air blowing angle of the air blowing channel is increased by a preset range, and the air suction angle of the corresponding air suction channel is correspondingly adjusted according to the adjusted air blowing angle of the air blowing channel.
6. A blast control system for a laser printing apparatus, the laser printing apparatus comprising a printing chamber for laying metal powder to form a print layer and a plurality of lasers for emitting a plurality of laser beams to the print layer to scan sinter the print layer, the blast control system comprising: The processing module is coupled with the laser printing equipment and is used for receiving and analyzing printing data of the laser printing equipment to form an air path control strategy, wherein the printing data comprises the track and position information of multiple laser movements of each printing layer; The air blowing module is coupled with the processing module and arranged at an air inlet of the printing chamber, and comprises a plurality of air blowing channels with adjustable angles, and the air blowing module is used for adjusting the air blowing angles of the air blowing channels based on the air path control strategy; the air suction module is coupled with the processing module and arranged at the lower air inlet of the printing chamber, and comprises a plurality of air suction channels with adjustable angles, and the air suction module is used for adjusting the air suction angles of the air suction channels based on the air path control strategy; the detection camera is coupled with the processing module and arranged at the top of the printing chamber, and is used for monitoring the laser path and the position information in the printing chamber in real time to acquire detection information and transmitting the detection information to the processing module; The processing module is further used for updating the wind path control strategy according to the received detection information; The plurality of blowing channels correspond to the plurality of air suction channels, each blowing channel corresponds to the corresponding air suction channel, so that a plurality of air path channels are formed, and a plurality of laser can be respectively positioned in the independent air path channels, so that only one laser beam exists in the independent air path channels.
7. The blower control system of claim 6, wherein a plurality of said blower channels are divided into a first blower portion and a second blower portion by a bisector, a plurality of said suction channels are divided into a first suction portion and a second suction portion by said bisector, each of said first blower portion and said second blower portion including three of said blower channels, said wind path control strategy including causing the blower angles of said blower channels of said first blower portion and said second blower portion to satisfy the following conditional expression: If it is θ 1 <90°,ψ 1 =(180-θ 1 )/2,ψ 2 =ψ 1 +(90-ψ 1 )/3,ψ 3 =ψ 1 +2(90-ψ 1 )/3; If it is θ 1 >90°,ψ 3 =(180-θ 1 )/2+90°,ψ 2 =ψ 3 +(90-ψ 3 ）/3,ψ 1 =ψ 3 +2（90-ψ 3 ）/3; If it is θ 2 <90°,ψ 4 =(180-θ 2 )/2,ψ 5 =ψ 4 +(90-ψ 4 )/3,ψ 6 =ψ 4 +2(90-ψ 4 )/3; If it is θ 2 >90°,ψ 6 =(180-θ 2 )/2+90°,ψ 5 =ψ 6 +(90-ψ 6 ）/3,ψ 4 =ψ 6 +2（90-ψ 6 ）/3; Wherein θ 1 is an angle between a line connecting the laser located at the left side of the upper tuyere and the laser located at the left side of the lower tuyere and a center line, wherein the center line is perpendicular to the bisector, ψ 1 、ψ 2 、ψ 3 is a blowing angle of three blowing channels gradually approaching the bisector in the first blowing portion, θ 2 is an angle between a line connecting the laser located at the right side of the upper tuyere and the laser located at the right side of the lower tuyere and the center line, and ψ 6 、ψ 5 、ψ 4 is a blowing angle of three blowing channels gradually approaching the bisector in the second blowing portion.
8. The blow control system of claim 7 wherein the first suction section and the second suction section each include three of the suction channels, the air path control strategy further comprising causing suction angles of the suction channels of the first suction section and the second suction section to satisfy the following conditional expression: ψ 7 =ψ 6 ,ψ 8 =ψ 5 ,ψ 9 =ψ 4 ,ψ 10 =ψ 3 ,ψ 11 =ψ 2 ,ψ 12 =ψ 1 ; Wherein, phi 7 、ψ 8 、ψ 9 is the suction angles of the three suction channels in the first suction part, which are gradually close to the bisector, and phi 12 、ψ 11 、ψ 10 is the suction angles of the three suction channels in the second suction part, which are gradually close to the bisector.
9. The blow control system of claim 6, wherein the suction module for adjusting suction angles of a plurality of the suction channels based on the air path control strategy comprises: And the air suction module delays a preset time to adjust the air suction angles of the air suction channels after receiving the air path control strategy.
10. The blower control system of claim 6, wherein the blower module includes a blower cavity having an air inlet and an air outlet having a caliber greater than the air inlet, and a plurality of blower assemblies disposed within the blower cavity at the air outlet of the blower cavity, each blower assembly including two synchronously rotating blower plates, the blower passage being formed between the two blower plates of each blower assembly.
11. The blower control system of claim 6, wherein the suction module includes a suction chamber having a suction port and an exhaust port having a smaller diameter than the suction port, and a plurality of suction assemblies disposed in the suction chamber at the suction port of the suction chamber, each suction assembly including two synchronously rotating suction plates, the suction passage being formed between the two suction plates of each suction assembly.
12. A laser printing apparatus comprising the blowing control system according to any one of claims 6 to 11.

Description

Blowing control method, blowing control system and laser printing equipment Technical Field The application relates to the technical field of metal 3D printing, in particular to a blowing control method, a blowing control system and laser printing equipment. Background Laser selective melting (SLM) is one method of metal additive manufacturing. In SLM metal 3D printing, laser sinters metal printing layers in a printing chamber point to surface according to the shape of the section of the part, and the metal printing layers are stacked layer by layer to form an integral part. Smoke dust can be generated in the laser sintering process, the smoke dust can interfere the irradiated laser, the laser intensity is weakened, and the organization and the performance of the part are affected, so that the smoke dust needs to be removed in time in the laser printing process. The fumes are currently carried away from the printing chamber by means of ventilation. However, in the current ventilation mode, smoke dust generated by laser sintering at the upper air opening position shields laser at the lower air opening position, so that the laser intensity at the lower air opening position is weakened, and the printing quality of the part is affected. Disclosure of Invention In view of the foregoing, it is necessary to provide a blowing control method, a blowing control system and a laser printing apparatus, which avoid the smoke dust generated by laser sintering at the upper tuyere from shielding the laser at the lower tuyere, and improve the printing quality. The embodiment of the application provides a blowing control method which is applied to laser printing equipment, wherein the laser printing equipment comprises a blowing module, an air suction module, a processing module and a detection camera, the blowing module comprises a plurality of blowing channels with adjustable angles, the air suction module comprises a plurality of air suction channels with adjustable angles, the processing module is used for analyzing data and controlling the blowing and suction angles of the blowing module and the air suction module, the blowing control method comprises the steps of analyzing printing data of the laser printing equipment to form an air path control strategy, the printing data comprises tracks and position information of multiple laser operation of each printing layer, the blowing angles of the blowing channels and the air suction angles of the air suction channels are adjusted based on the air path control strategy to form a plurality of air path channels, the laser paths and the position information in the laser printing equipment are monitored in real time by the detection camera to obtain detection information, and the air path control strategy is updated according to the detection information, wherein the air path control strategy is used for enabling the laser on each printing layer to be in the independent multiple laser paths. In some embodiments, the analyzing the print data of the laser printing device to form the wind path control strategy includes obtaining the track and position information of the operation of the multiple laser beams of each print layer in the print data, analyzing the track and position information of the operation of the multiple laser beams of each print layer, calculating the most suitable blowing and sucking angle of each wind path channel so that each laser beam is in an independent wind path channel, and forming the wind path control strategy based on the most suitable blowing and sucking angle of each wind path channel. In some embodiments, the plurality of said blow channels are divided by a bisector into a first blow portion and a second blow portion, each of said first blow portion and said second blow portion comprising three of said blow channels, said wind path control strategy comprising making the blow angles of said blow channels of said first blow portion and said second blow portion satisfy the condition that if θ1<90°,ψ1＝(180-θ1)/2,ψ2＝ψ1+(90-ψ1)/3,ψ3＝ψ1+2(90-ψ1)/3; if 3724 if θ2>90°,ψ6＝(180-θ2)/2+90°,ψ5＝ψ6+(90-ψ6)/3,ψ4＝ψ6+2(90-ψ6)/3;, θ 1 is the angle between the line between the laser located on the left of the uptake and the laser located on the left of the drop and a midline perpendicular to said bisector, and θ 1、ψ2、ψ3 is the blow angle between the line between the laser located on the right of the uptake and the laser located on the right of the drop and said midline, and θ 2 is the blow angle of the three of said blow channels in said second blow portion gradually approaching said bisector. In some embodiments, the plurality of air suction channels are divided by the bisector into a first air suction portion and a second air suction portion, each of the first air suction portion and the second air suction portion includes three air suction channels, and the wind path control strategy further includes making the air suction angles of the air suction channels of the fir