CN111299879A - Anti-condensation method for laser head - Google Patents
Anti-condensation method for laser head Download PDFInfo
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- CN111299879A CN111299879A CN202010400260.3A CN202010400260A CN111299879A CN 111299879 A CN111299879 A CN 111299879A CN 202010400260 A CN202010400260 A CN 202010400260A CN 111299879 A CN111299879 A CN 111299879A
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- temperature
- heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Abstract
The invention provides a laser head anti-condensation method, which belongs to the technical field of laser cutting. The anti-dewing method comprises the following steps: acquiring temperature and humidity data of air in the inner cavity; the control system calculates the dew point temperature of the inner cavity according to the acquired information; the control system judges whether to start the heating component for heating according to the difference between the outer wall temperature of the body and the dew point temperature and the difference between the lens group unit and the dew point temperature. The method can prevent the phenomenon of condensation on the wall surface of the inner cavity of the laser head body and the lens group unit, and avoid the influence of condensation on the normal work of the laser head.
Description
Technical Field
The invention relates to the technical field of laser cutting, in particular to a laser head anti-condensation method.
Background
Laser cutting is one of the most important processing methods in the laser processing industry, and is widely applied to industries such as automobiles, ships, mechanical manufacturing, chemical engineering, light industry, electrical appliances, electronics, petroleum, metallurgy and the like at present; the method has the advantages of regular processing section, small heat effect, no crack or metallurgical defect, high processing speed, high efficiency and wide application range, and has incomparable superiority compared with the traditional mechanical processing and electric spark processing. The laser cutting processing has wide market prospect, and with the rapid development of modern science and technology, researchers at home and abroad research the laser cutting and promote the rapid development of the laser processing.
When the laser cutting machine works in an environment with high humidity, the temperature inside the optical cavity of the laser head is increased due to the fact that the laser head can generate high temperature, the temperature of the outer wall of the optical cavity and the temperature of the lens are too low, and dew condensation is easily formed at the two positions. If the dew condensation is light, the laser head cannot work normally, and the function can be recovered only by cleaning the dew condensation water; the serious condition directly causes the irreparable damage of the laser head and even the laser. The chinese patent with application number 201810228409.7 discloses a laser head with anti-condensation function, which comprises a temperature and humidity sensing module, an alarm module and a controller, wherein the controller comprises a calculating unit and a judging unit. The laser head can monitor the temperature and humidity inside the laser head and the temperature of cooling water. However: firstly, a laser head in a comparison document is cooled and insulated by cooling water, when the temperature of the cooling water is lower than the dew point temperature, an operator is required to control the temperature of the cooling water, so that the automatic control cannot be realized, a certain operation time difference exists, and the automation of laser cutting is not facilitated; secondly, a threshold value of the temperature difference between the cooling water and the dew point is not set in the comparison file, so that the cooling water cannot be kept in a stable temperature range, and the temperature avoided by the laser head cannot be kept in the stable temperature range; finally, the cooling water in the comparison file cools the laser head main body, does not directly act on the lens group in the laser head, and cannot directly control the temperature of the lens group.
Disclosure of Invention
The invention aims to provide a laser head anti-condensation method which can prevent condensation on the wall surface of the inner cavity of a laser head body and a lens group unit and avoid the influence of condensation on the normal work of the laser head.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the laser head comprises a body, an inner cavity is formed in the body, a mirror group unit is arranged in the inner cavity, a first heating assembly is arranged on the outer wall of the body, and a second heating assembly is arranged on the outer wall of the mirror group unit;
a first temperature sensor, a second temperature sensor and a temperature and humidity sensor are mounted on the inner wall of the body, wherein the first temperature sensor is used for collecting the temperature of the wall surface of the body, the second temperature sensor is used for collecting the temperature of the lens group unit, the temperature and humidity sensor is used for collecting the temperature and humidity data of air in the inner cavity, and the first temperature sensor, the second temperature sensor and the temperature and humidity sensor are all electrically connected with a control system of the laser cutting machine;
the method comprises the following steps:
acquiring temperature and humidity data of the air in the inner cavity, and feeding back the acquired data to the control system;
importing a coefficient value comparison table and a dew point temperature empirical formula of the relative humidity-dew point temperature empirical formula calculation of the area into the control system, and calculating the dew point temperature of the inner cavity by the control system according to the acquired information;
setting a threshold value delta T of a difference value between the wall surface temperature and the dew point temperature of the body1A threshold value delta T of the difference value between the temperature of the lens group unit and the dew point temperature2When Δ T is1<At 2 ℃, the first heating component is started, and when delta T is reached1>When the temperature is 2 ℃, the first heating assembly stops heating; when Δ T2<At 2 deg.C, the second heating assembly is activated, at2>And when the temperature is 2 ℃, the second heating component stops heating.
In a preferred technical scheme of the present invention, the first heating assembly includes a first housing and a first heating pipe, the first housing is wrapped on the side wall of the body, a first heating layer is formed between the first housing and the side wall of the body, and the first heating pipe is installed on the inner wall of the first housing;
the second heating assembly comprises a second shell and a second heating pipe, the second shell is coated on the side wall of the mirror group unit, a second heating layer is formed between the second shell and the side wall of the mirror group unit, and the second heating pipe is mounted on the inner wall of the second shell.
In a preferred technical scheme of the present invention, the first heating assembly includes a first housing and a first heating pipe, the first housing is wrapped on the side wall of the body, a first heating layer is formed between the first housing and the side wall of the body, and the first heating pipe is installed on the inner wall of the first housing;
the second heating assembly comprises a second shell, the second shell is coated on the side wall of the mirror group unit, a second heating layer is formed between the second shell and the side wall of the mirror group unit, and the first heating layer is communicated with the second heating layer through a heat conduction pipeline.
In a preferred embodiment of the present invention, the first housing covers a sidewall portion of the main body, and the second housing covers a sidewall portion of the lens unit.
In a preferred technical scheme of the present invention, the first temperature sensor is a contact sensor, the second temperature sensor is a non-contact infrared sensor, and a collecting head of the second temperature sensor is disposed opposite to the lens group unit.
In a preferred technical scheme of the invention, the outer wall of the body is provided with an alarm device, and when the alarm device works as delta T1<2 ℃ and the first heating component is not started or delta T2<When the temperature is 2 ℃ and the second heating assembly is not started, the alarm device is started;
when Δ T1>2 ℃ and the first heating component is not stopped or Δ T2>And when the temperature is 2 ℃ and the second heating component is not stopped, the alarm device is started.
The invention has the beneficial effects that:
the invention provides a laser head anti-condensation method, which comprises the steps of measuring the temperature of the inner wall of a laser head body, the temperature of a lens group unit and the temperature and humidity data of air in an inner cavity through a first temperature sensor, a second temperature sensor and a temperature and humidity sensor, obtaining the dew point temperature of the inner cavity through calculation, automatically starting a heating component to heat the laser head body or the lens group unit when the difference between the temperature of the inner wall of the laser head body and the dew point temperature is less than 2 ℃ or the difference between the temperature of the lens group unit and the dew point temperature is less than 2 ℃, and directly acting the heating component on the outer wall of the body and the lens group unit to prevent the inner wall surface of the inner cavity of the laser head body or the lens group unit from condensation, so that the normal work of the laser head is prevented from being.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a schematic structural diagram of a laser head anti-condensation method in embodiment 1 provided by the invention;
fig. 2 is a schematic structural diagram of a laser head dewing prevention method in embodiment 2 of the present invention.
Reference numerals:
1. a body; 2. a first heating assembly; 3. a lens group unit; 4. a first temperature sensor; 5. a second temperature sensor; 6. a temperature and humidity sensor; 7. a second heating assembly; 8. a heat conducting pipe; 9. an alarm device; 11. an inner cavity; 21. a first housing; 22. a first heating pipe; 23. a first heating layer; 71. a second housing; 72. a second heating pipe; 73. a second heating layer.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly. In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
Example 1:
as shown in fig. 1, the laser head comprises a body 1, an inner cavity 11 is formed in the body 1, a lens group unit 3 is arranged in the inner cavity 11, a first heating assembly 2 is arranged on the outer wall of the body 1, and a second heating assembly 7 is arranged on the outer wall of the lens group unit 3;
a first temperature sensor 4, a second temperature sensor 5 and a temperature and humidity sensor 6 are mounted on the inner wall of the body 1, wherein the first temperature sensor 4 collects the wall surface temperature of the body 1, the second temperature sensor 5 collects the temperature of the lens group unit 3, the temperature and humidity sensor 6 collects the temperature and humidity data of the air in the inner cavity 11, and the first temperature sensor 4, the second temperature sensor 5 and the temperature and humidity sensor 6 are electrically connected with a control system of the laser cutting machine; further, the first temperature sensor 4 is a contact sensor, such as a thermocouple sensor; the second temperature sensor 5 is a non-contact infrared sensor, such as an MLX90614 temperature measurement sensor; the collecting head of the second temperature sensor 5 is arranged opposite to the lens group unit 3 so as to collect the temperature of the lens group unit 3. And the temperature and humidity sensor 6 adopts an MS8607PHT composite sensor.
The method comprises the following steps:
acquiring temperature and humidity data of the air in the inner cavity 11, and feeding back the acquired data to the control system;
importing a coefficient value comparison table and a dew point temperature empirical formula of the relative humidity-dew point temperature empirical formula calculation of the area into the control system, and calculating the dew point temperature of the inner cavity 11 by the control system according to the acquired information;
setting a threshold value delta T of a difference value between the wall surface temperature and the dew point temperature of the body 11A threshold value delta T of the difference between the temperature of the mirror group unit 3 and the dew point temperature2When Δ T is1<At 2 ℃, the first heating assembly 2 is activated, at Δ T1>At 2 ℃, the first heating assembly 2 stops heating; when Δ T2<At 2 ℃, the second heating component 7 is activated, at Δ T2>And at 2 ℃, the second heating assembly 7 stops heating.
According to the method, the first temperature sensor 4 is used for collecting the wall surface temperature of the body 1, the second temperature sensor 5 is used for collecting the temperature of the lens group unit 3, and the temperature and humidity sensor 6 is used for collecting the temperature and humidity data of the air in the inner cavity 11. And then the control system calculates a coefficient value comparison table and a dew point temperature empirical formula according to the acquired data and the relative humidity-dew point temperature empirical formula of the area to obtain the dew point temperature of the implementation inner cavity 11 through calculation, and compares the dew point temperature with the temperature of the inner wall of the body 1 and the temperature of the mirror group unit 3. If the temperature of inner chamber 11 inner wall or when the temperature of mirror group unit 3 is less than dew point temperature, inner chamber 11 inner wall or the condensation phenomenon will appear in mirror group unit 3, influences laser cutting machine's normal operating. In order to prevent the dew condensation phenomenon, a method of raising the temperature of the inner wall of the inner chamber 11, the lens group unit 3 or lowering the temperature of the inner chamber 11 may be adopted. And in this application through 1 outer wall of body sets up first heating element 2 the 3 outer walls of mirror group unit set up second heating element 7 to the difference according to temperature between them and dew point temperature heats automatically, effectively prevents the emergence of dewfall phenomenon.
Foretell laser head antisweat method, this method takes a monitoring devices, this method passes through first temperature sensor 4, second temperature sensor 5 and temperature and humidity sensor 6 survey laser head body 1 inner wall temperature, 3 temperatures of mirror group unit and the temperature and humidity data of the air in the inner chamber 11 obtain through calculating inner chamber 11 dew point temperature, when the laser head body 1 inner wall temperature is less than 2 ℃ with dew point temperature's difference or 3 temperatures of mirror group unit and dew point temperature's difference is less than 2 ℃, heating element automatic start to the laser head body 1 or mirror group unit 3 heats, heating element direct action in body 1 outer wall with prevent on mirror group unit 3 the laser head body 1 the inner chamber 11 wall or mirror group unit 3 the dewfall phenomenon appears, the normal work of laser head is avoided the dewfall to influence, and degree of automation is high moreover, need not manual control, can effectively practice thrift the human cost.
More specifically, the dew point temperature empirical formula is: t isd= a ψ + Bt, wherein: t isdDew point temperature, psi relative humidity, t dry bulb temperature (air temperature). A. B is the calculated coefficient of an empirical formula of the dew point temperature related to the relative humidity.
The empirical formula of relative humidity-dew point temperature calculates the coefficient value comparison table (part) as follows:
further, the first heating assembly 2 comprises a first shell 21 and a first heating pipe 22, the first shell 21 is coated on the side wall of the body 1, a first heating layer 23 is formed between the first shell 21 and the side wall of the body 1, and the first heating pipe 22 is installed on the inner wall of the first shell 21;
the second heating assembly 7 comprises a second housing 71 and a second heating pipe 72, the second housing 71 is covered on the side wall of the mirror group unit 3, a second heating layer 73 is formed between the second housing 71 and the side wall of the mirror group unit 3, and the second heating pipe 72 is installed on the inner wall of the second housing 71. Further, the first housing 21 partially or completely covers the side wall of the main body 1, and the second housing 71 partially or completely covers the side wall of the lens unit 3. In this embodiment, the first heating element 2 and the second heating element 7 respectively heat the body 1 and the mirror group unit 3, and are independently controlled, so that the heating is more flexible and controllable.
Further, an alarm device 9 is arranged on the outer wall of the body 1, and when the delta T is detected, the alarm device1<2 ℃ and the first heating element 2 is not activated or Δ T2<When the temperature is 2 ℃ and the second heating component 7 is not started, the alarm device 9 is started;
when Δ T1>2 ℃ and the first heating element 2 is not stopped or Δ T2>When the temperature is 2 ℃ and the second heating component 7 is not stopped, the alarm device 9 is started. Alarm device 9 is in first heating element 2 or when second heating element 7 normally works in trouble, just when the environment of inner chamber 11 breaks away from the temperature range of normal work, send out the police dispatch newspaper, remind operating personnel to overhaul the maintenance to equipment, play warning effect.
Example 2:
referring to fig. 2, the present embodiment is different from embodiment 1 in that: "the first heating assembly 2 includes a first housing 21 and a first heating pipe 22, the first housing 21 is covered on the side wall of the body 1, a first heating layer 23 is formed between the first housing 21 and the side wall of the body 1, and the first heating pipe 22 is installed on the inner wall of the first housing 21;
second heating element 7 includes second casing 71, second casing 71 cladding is in the unit 3 lateral wall is organized to the mirror, second casing 71 with form second zone of heating 73 between the unit 3 lateral wall is organized to the mirror, first zone of heating 23 with second zone of heating 73 communicates each other through heat conduction pipeline 8. "
This embodiment is in the body 1 outer wall with 3 outer walls of mirror group unit all are equipped with the zone of heating, install first heating pipe 22 in the outer first zone of heating 23 of body 1 lateral wall, first zone of heating 23 with communicate through heat conduction pipeline 8 between the second zone of heating 73, hot-air accessible heat conduction pipeline 8 in the first zone of heating 23 gets into in the second zone of heating 73, right unit 3 of mirror group heats. This embodiment reduces the installation of the heating pipes and makes the control procedure simpler. It should be noted that, there are not less than two pipes connecting the first heating layer 23 and the second heating layer 73, so as to ensure that the hot air of the first heating layer 23 can enter the second heating layer 73 quickly and uniformly.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (6)
1. The utility model provides a laser head anti-condensation method, the laser head includes body (1), be equipped with inner chamber (11) in body (1), be equipped with mirror group unit (3) in inner chamber (11), its characterized in that: a first heating assembly (2) is arranged on the outer wall of the body (1), and a second heating assembly (7) is arranged on the outer wall of the lens group unit (3);
a first temperature sensor (4), a second temperature sensor (5) and a temperature and humidity sensor (6) are mounted on the inner wall of the body (1), wherein the first temperature sensor (4) collects the wall surface temperature of the body (1), the second temperature sensor (5) collects the temperature of the lens group unit (3), the temperature and humidity sensor (6) collects the temperature and humidity data of air in the inner cavity (11), and the first temperature sensor (4), the second temperature sensor (5) and the temperature and humidity sensor (6) are electrically connected with a control system of the laser cutting machine;
the method comprises the following steps:
acquiring temperature and humidity data of air in the inner cavity (11), and feeding back the acquired data to the control system;
importing a coefficient value comparison table and a dew point temperature empirical formula of the relative humidity-dew point temperature empirical formula calculation of the area into the control system, and calculating the dew point temperature of the inner cavity (11) by the control system according to the acquired information;
setting a threshold value delta T of a difference value between the wall surface temperature and the dew point temperature of the body (1)1A threshold value delta T of the difference between the temperature of the mirror group unit (3) and the dew point temperature2When Δ T is1<At 2 ℃, the first heating assembly (2) is activated, at Δ T1>At 2 ℃, the first heating component (2) stops heating; when Δ T2<At 2 ℃, the second heating component (7) is activated, when Δ T2>And when the temperature is 2 ℃, the second heating component (7) stops heating.
2. The laser head dewing prevention method according to claim 1, characterized in that:
the first heating assembly (2) comprises a first shell (21) and a first heating pipe (22), the first shell (21) is coated on the side wall of the body (1), a first heating layer (23) is formed between the first shell (21) and the side wall of the body (1), and the first heating pipe (22) is installed on the inner wall of the first shell (21);
the second heating assembly (7) comprises a second shell (71) and a second heating pipe (72), the second shell (71) is coated on the side wall of the mirror group unit (3), a second heating layer (73) is formed between the second shell (71) and the side wall of the mirror group unit (3), and the second heating pipe (72) is installed on the inner wall of the second shell (71).
3. The laser head dewing prevention method according to claim 1, characterized in that:
the first heating assembly (2) comprises a first shell (21) and a first heating pipe (22), the first shell (21) is coated on the side wall of the body (1), a first heating layer (23) is formed between the first shell (21) and the side wall of the body (1), and the first heating pipe (22) is installed on the inner wall of the first shell (21);
second heating element (7) include second casing (71), second casing (71) cladding is in unit (3) lateral wall is organized to the mirror, second casing (71) with form second zone of heating (73) between unit (3) lateral wall is organized to the mirror, first zone of heating (23) with second zone of heating (73) communicate each other through heat conduction pipeline (8).
4. The laser head dewfall prevention method according to claim 2 or 3, characterized in that:
the first shell (21) partially or completely covers the side wall of the body (1), and the second shell (71) partially or completely covers the side wall of the lens group unit (3).
5. The laser head dewing prevention method according to claim 4, wherein:
the first temperature sensor (4) is a contact sensor, the second temperature sensor (5) is a non-contact infrared sensor, and a collecting head of the second temperature sensor (5) is arranged right opposite to the lens group unit (3).
6. The laser head antisweat method according to any of the claims 1 to 3, characterized in that:
the outer wall of the body (1) is provided with an alarm device (9) when the delta T is reached1<2 ℃ and the first heating component (2) is not activated or Delta T2<When the temperature is 2 ℃ and the second heating component (7) is not started, the alarm device (9) is started;
when Δ T1>2 ℃ and the first heating component (2) is not stopped or Delta T2>When the temperature is 2 ℃ and the second heating component (7) is not stopped, the alarm device (9) is started.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112809201A (en) * | 2021-01-28 | 2021-05-18 | 王远彬 | Metal material laser cutting device |
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| JP7152646B2 (en) * | 2021-02-25 | 2022-10-13 | 株式会社安川電機 | LASER PROCESSING DEVICE, LASER PROCESSING SYSTEM, LASER PROCESSING METHOD |
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| CN112809201A (en) * | 2021-01-28 | 2021-05-18 | 王远彬 | Metal material laser cutting device |
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