阅读说明：本技术 一种激光/电弧增减材制造装备气氛监控系统及监控方法 (Atmosphere monitoring system and monitoring method for laser/electric arc material increase and decrease manufacturing equipment ) 是由 方学伟 任传奇 杨金波 王帅鹏 白浩 杨健楠 黄科 卢秉恒 于 2020-06-04 设计创作，主要内容包括：本发明公开了一种激光/电弧增减材制造装备气氛监控系统及监控方法,本发明的红外点温仪设备可直接监测局部点温度或者监测熔池温度,为探索工艺窗口提供必要数据,同步可获得最佳成形温度,为工艺提供数据支撑,防止出现过热堆积或局部高温,及时规避成形过程中的缺陷。本发明能够应用场景于钛合金电弧/激光为热源的熔丝增减材制造过程,其效率高、集增减材一体化制造,其应用不局限与激光/电弧增减材形式,设备操作主体可以为机器人执行器和数控装备系统,多传感器复合可严格监测成形过程气氛环境,同时基于多传感器反馈的数据,控制各执行部件,实现了全过程自动化操作。(The invention discloses an atmosphere monitoring system and an atmosphere monitoring method for laser/electric arc material increase and decrease manufacturing equipment. The invention can be applied to the manufacturing process of increasing and decreasing materials of a fuse wire taking titanium alloy electric arc/laser as a heat source, has high efficiency, integrates the material increase and decrease and is manufactured integrally, the application of the invention is not limited to the material increase and decrease form with laser/electric arc, the equipment operation main body can be a robot actuator and a numerical control equipment system, the atmosphere environment of the forming process can be strictly monitored by compounding multiple sensors, and simultaneously, each execution part is controlled based on the data fed back by the multiple sensors, thereby realizing the automatic operation of the whole process.)

1. The utility model provides a laser/electric arc increase and decrease material manufacturing equipment atmosphere monitored control system, a serial communication port, including box (6), be provided with table surface (19) in box (6), be provided with first sensor group I and second sensor group II on box (6) internal surface, first sensor group I and second sensor group II opposite direction set up, first sensor group I is including horizontal first trace oxygen content sensor (1) that sets gradually, first constant oxygen content sensor (2), first dew point appearance (3), first vaccum meter (4) and first temperature sensor (5), second sensor group II is including horizontal second trace oxygen content sensor (8) that sets gradually, second constant oxygen content sensor (9), second dew point appearance (10) second vaccum meter (11) and second temperature sensor (12), box (6) are through corresponding pipeline respectively connecting vacuum pump (22), The opening of the argon bottle (18) and the compressed air bottle (17), the opening of the vacuum pump (22) and the amount of argon and/or compressed air introduced into the box body (6) are controlled by a control unit (20).

2. The atmosphere monitoring system for laser/arc additive and subtractive manufacturing equipment according to claim 1, wherein the first sensor group I is located at 3/4 of the effective total height of the inner box, the second sensor group is located at 1/4 of the effective total height of the inner box, the second sensor group is higher than the working table (19), and h is higher if the actual working table (19) is higher than 1/4 of the effective total height of the inner box_2＝(h₃+150)mm，h₂The height h from the second sensor group II to the bottom of the box body₃Is the height of the bottom of the box body.

3. The atmosphere monitoring system for the laser/arc additive and subtractive manufacturing equipment according to claim 1, wherein a vacuum pump adjusting electromagnetic valve (16) is arranged on a pipeline connecting the box body (6) and the vacuum pump (17), an argon electromagnetic valve (13) and an argon reducing valve (15) are arranged on a pipeline connecting the box body (6) and the argon bottle (18), a compressed air electromagnetic valve (14) is arranged on a pipeline connecting the box body (6) and the compressed air bottle (17), and the vacuum pump adjusting electromagnetic valve (21), the argon electromagnetic valve (13) and the compressed air electromagnetic valve (14) are connected with the control unit (20).

4. The laser/arc additive manufacturing equipment atmosphere monitoring system according to claim 1, wherein the control unit (20) adopts Siemens S7-1200PLC and Siemens analog input and output module matched with the same, the analog input module supports 4-20mA standard signal and 0-10V standard signal, and preferably Siemens TC module is used for collecting temperature signal.

5. The monitoring method of the atmosphere monitoring system of the laser/arc additive and subtractive manufacturing equipment according to claim 1, comprising the steps of:

firstly, performing gas washing operation in a box body (6) to enable the pressure to reach the atmospheric pressure P value under the argon environment, and enabling the micro-oxygen content and the water content to reach threshold values;

step two, manufacturing a laser/electric arc material increase and decrease in the box body (6), wherein the first sensor group I and the second sensor group II work synchronously in the process of continuously collecting the atmosphere environment data in the box body (6), and if the collected data exceeds the threshold range, sending a stop signal, and performing the step one;

and step three, executing a material reduction process or synchronously executing the material increase and reduction after the material increase forming process is finished, starting a vacuum pump (22) to pump out argon in the box body (6) after the final material reduction process is finished, then introducing compressed air, opening a bin door when the air pressure reaches a threshold value, and taking out the sample piece.

6. The monitoring method of the atmosphere monitoring system of the laser/arc additive and subtractive manufacturing equipment according to claim 5, wherein in the first step, the specific method of the gas washing operation is as follows:

the method comprises the steps that firstly, a vacuum pump (22) is controlled to be started through a control unit (20) according to needs, the vacuum degree in a box body (6) is enabled to reach the required vacuum degree, the vacuum pump (22) is closed, argon is introduced into the box body (6), the atmosphere in the box body is enabled to reach the required atmosphere environmental pressure, and the argon is closed;

and step two, repeating the step one for a plurality of times to finish the gas washing operation.

7. The monitoring method of the atmosphere monitoring system of the laser/arc additive manufacturing equipment according to claim 6, wherein the vacuum pump regulating electromagnetic valve (21) is closed before the vacuum pump (22) is closed.

Technical Field

The invention belongs to the field of material increase and decrease manufacturing equipment, and particularly relates to an atmosphere monitoring system and method for laser/electric arc material increase and decrease manufacturing equipment.

Background

Modern welding techniques are used to manufacture parts of varying shapes and are referred to by specific names such as weld forming, fusion forming, rapid prototyping, solid free form forming, shape metal deposition and three-dimensional welding, but most commonly by the name of Wire and Arc Additive Manufacturing (WAAM) arc fuse 3D printing. The WAAM manufacturing system generally consists of an arc heat source, an automatic wire feeding system, a computer controlled robot/numerical control platform and other ancillary mechanisms. WAAM technology is gaining increasing attention from the industrial manufacturing sector because of its ability to fabricate large metal structures at high deposition rates, low equipment costs, high material utilization, and the resulting environmental friendliness.

The material reducing manufacturing technology is relative to 'material increasing manufacturing', namely, a traditional machining mode, namely, a raw material or a blank is clamped in a station by a universal or special clamp, and the machining surface quality and the dimensional tolerance of a part are ensured by a machining mode of reducing or removing materials by a cutter in a specific process, such as turning, milling, boring and the like, namely, the traditional machining mode is adopted.

At present, the 3D printing technology has been successfully applied to international space, ships, aerospace, medicine, architecture and other fields, and has made significant progress. However, there are many limiting factors that hinder the development of large-scale applications, such as long printing time, inability to monitor the printing quality on line and modify the printing parameters in time, low printing precision, and the need for re-processing.

Disclosure of Invention

The invention aims to overcome the defects and provides an atmosphere monitoring system and an atmosphere monitoring method for laser/electric arc material increasing and decreasing manufacturing equipment, so that high-quality and rapid material increasing and decreasing of a printed product are realized.

In order to achieve the purpose, the atmosphere monitoring system of the laser/electric arc increase and decrease material manufacturing equipment comprises a box body, wherein a working table is arranged in the box body, a first sensor group I and a second sensor group II are arranged on the inner surface of the box body, the first sensor group and the second sensor group are oppositely arranged, the first sensor group comprises a first trace oxygen content sensor, a first constant oxygen content sensor, a first dew point meter, a first vacuum gauge and a first temperature sensor which are transversely and sequentially arranged, the second sensor group II comprises a second trace oxygen content sensor, a second constant oxygen content sensor, a second dew point meter, a second vacuum gauge and a second temperature sensor which are transversely and sequentially arranged, a first temperature sensor and a second temperature sensor are respectively arranged on the adjacent surfaces in the box body, the box body is respectively connected with a vacuum pump, an argon bottle and a compressed air bottle through pipelines, the opening of the vacuum pump and the amount of the argon and/or the compressed air introduced into the box body are controlled by the control unit.

The first sensor group is arranged at the position of the effective total height 3/4 of the internal box body, the second sensor group is arranged at the position of the effective total height 1/4 of the internal box body, the second sensor group is higher than the working table, and if the height of the actual working table is larger than the effective total height 1/4 of the internal box body, h is_2＝(h₃+150)mm，h₂The height h from the second sensor group II to the bottom of the box body₃Is the height of the bottom of the box body.

The pipeline of the box body connected with the vacuum pump is provided with a vacuum pump adjusting electromagnetic valve, the pipeline of the box body connected with the argon bottle is provided with an argon electromagnetic valve and an argon pressure reducing valve, the pipeline of the box body connected with the compressed air bottle is provided with a compressed air electromagnetic valve, and the vacuum pump adjusting electromagnetic valve, the argon electromagnetic valve and the compressed air electromagnetic valve are connected with a control unit.

The control unit adopts Siemens S7-1200PLC and Siemens analog input and output module matched with the same, the analog input module supports 4-20mA standard signal and 0-10V standard signal, and preferably the Siemens TC module is used for collecting temperature signal.

A monitoring method of an atmosphere monitoring system of laser/electric arc material increase and decrease manufacturing equipment comprises the following steps:

firstly, performing gas washing operation in a box body to enable the pressure to reach an atmospheric pressure P value under an argon environment, and enabling the micro-oxygen content and the water content to reach threshold values;

step two, performing laser/electric arc material increase and decrease manufacturing in the box body, wherein in the process, a first sensor group, a second sensor group and data in the box body are continuously collected, if the collected data exceed a threshold range, a stop signal is sent, and step one is performed;

and step three, executing a material reducing process or synchronously executing the material increasing and reducing process after the material increase forming process is finished, starting a vacuum pump to pump out argon in the box body after the final material reducing process is finished, then introducing compressed air, opening the bin door when the air pressure reaches a threshold value, and taking out the sample piece.

In the first step, the specific method of the gas washing operation is as follows:

the method comprises the following steps that firstly, a vacuum pump is controlled to be started through a control unit according to needs, so that the required vacuum degree in a box body is achieved, the vacuum pump is closed, argon is introduced into the box body, the atmosphere in the box body reaches the required atmosphere environmental pressure, and the argon is closed;

and step two, repeating the step one for a plurality of times to finish the gas washing operation.

Before the vacuum pump is closed, the vacuum pump regulating electromagnetic valve is closed.

Compared with the prior art, the infrared point thermometer equipment can directly monitor the temperature of a local point or the temperature of a molten pool, provide necessary data for exploring a process window, synchronously obtain the optimal forming temperature, provide data support for the process, prevent overheating accumulation or local high temperature and avoid defects in the forming process in time. The invention can be applied to the manufacturing process of increasing and decreasing materials of a fuse wire taking titanium alloy electric arc/laser as a heat source, has high efficiency, integrates the material increase and decrease and is manufactured integrally, the application of the invention is not limited to the material increase and decrease form with laser/electric arc, the equipment operation main body can be a robot actuator and a numerical control equipment system, the atmosphere environment of the forming process can be strictly monitored by compounding multiple sensors, and simultaneously, each execution part is controlled based on the data fed back by the multiple sensors, thereby realizing the automatic operation of the whole process.

According to the monitoring method, the atmosphere environment in the closed box body is monitored, and the atmosphere requirement of a laser/arc fuse material additive manufacturing environment is met firstly; secondly, in the material adding process or the material adding and reducing composite process, environmental conditions are monitored in real time, pressure conditions, water oxygen content and atmosphere temperature are used as threshold values for judgment, and when the environmental conditions are not met, the environmental conditions are fed back to the control unit through the sensor in time for compensation; after the forming is finished, after the environmental atmosphere and the temperature condition are stable, the product is taken out, and the safe and reliable operation is ensured; and (4) full automation step and convenient operation.

Furthermore, before the vacuum pump is turned off, the vacuum pump regulating electromagnetic valve is turned off, so that leakage can be prevented, and atmosphere can be prevented from entering the internal box body through the vacuum pump.

Drawings

FIG. 1 is a block diagram of the system of the present invention;

FIG. 2 is a flow chart of the present invention;

the device comprises a first micro oxygen content sensor, a second micro oxygen content sensor, a first constant oxygen content sensor, a second constant oxygen content sensor, a first dew point instrument, a second dew point instrument, a first vacuum gauge, a first temperature sensor, a first constant oxygen content sensor, a box body, a second constant oxygen content sensor, a visual sensor, a second constant oxygen content sensor, a second dew point instrument, a second vacuum gauge, a second constant oxygen content sensor, a second dew point instrument, a second vacuum gauge, a second temperature sensor, a third temperature sensor, a fourth.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Referring to fig. 1, an atmosphere monitoring system for laser/arc material increase and decrease manufacturing equipment comprises a box body 19, a worktable 22 is arranged in the box body 19, a first sensor group I and a second sensor group II are arranged on the inner surface of the box body 19, the first sensor group I and the second sensor group II are oppositely arranged, the first sensor group I comprises a first trace oxygen content sensor 1, a first constant oxygen content sensor 2, a first dew point instrument 3, a first vacuum gauge 4 and a first temperature sensor 5 which are transversely and sequentially arranged, the second sensor group II comprises a second trace oxygen content sensor 8, a second constant oxygen content sensor 9, a second dew point instrument 10, a second vacuum gauge 11 and a second temperature sensor 12 which are transversely and sequentially arranged, a visual sensor 7 is arranged on the adjacent surface in the box body 19, the box body 19 is respectively connected with a vacuum pump through a pipeline, 22, a, The argon bottle 18 and the compressed air bottle 17, the opening of the vacuum pump 22 and the introduction of argon and/or compressed air into the tank 19 are controlled by the control unit 20.

The first sensor group 1 is arranged at the position of the effective total height 3/4 of the inner box, the second sensor group is arranged at the position of the effective total height 1/4 of the inner box, and the second sensor group is higher than the worktable 19.

A vacuum pump adjusting electromagnetic valve 21 is arranged on a pipeline for connecting the box body 19 and the vacuum pump 22, an argon electromagnetic valve 13 and an argon pressure reducing valve 15 are arranged on a pipeline for connecting the box body 19 and the argon bottle 18, a compressed air electromagnetic valve 14 is arranged on a pipeline for connecting the box body 19 and the compressed air bottle 17, and the vacuum pump adjusting electromagnetic valve 21, the argon electromagnetic valve 13 and the compressed air electromagnetic valve 14 are connected with a control unit 20.

The control unit 20 adopts Siemens S7-1200PLC and Siemens analog input and output module matched with the same, the analog input module supports 4-20mA standard signal and 0-10V standard signal, and preferably the Siemens TC module is used for collecting temperature signal.

A monitoring method of an atmosphere monitoring system of laser/electric arc material increase and decrease manufacturing equipment comprises the following steps:

step one, controlling to start a vacuum pump 22 through a control unit 20 according to requirements to enable the interior of a box body 19 to reach a required vacuum degree, closing the vacuum pump 22, introducing argon into the box body 19 to enable the interior atmosphere of the box body to reach a required atmosphere environmental pressure, and closing the introduction of the argon;

step two, repeating the first step for a plurality of times to finish the gas washing operation, so that the pressure under the argon environment reaches the atmospheric pressure P value, and the micro-oxygen content and the water content approach the threshold values;

thirdly, manufacturing a laser/electric arc material increasing and decreasing mode in the box body 19, continuously collecting the atmosphere environment data in the box body 19 by the first sensor group I and the second sensor group II in the process, if the collected data exceed the threshold range, sending a stop signal, and performing the first step and the second step;

and step four, executing a material reducing process or a material increasing and reducing composite process after the material increasing and forming process is finished, starting a vacuum pump 22 to pump out argon in the box body 19 after the final material reducing process is finished, then introducing compressed air, opening a bin door when the air pressure reaches a threshold value, and taking out the sample.