阅读说明：本技术 用于扫描系统的故障处理方法、装置及增材制造设备 (Fault handling method and device for scanning system and additive manufacturing equipment ) 是由 刘鹏 王鹏飞 何佳 于 2021-06-30 设计创作，主要内容包括：一种用于扫描系统的故障处理方法、装置及增材制造设备,其中,用于扫描系统的故障处理的方法包括：获取扫描系统中每一轴镜的工作状态；当扫描系统的所有轴镜的工作状态均正常时,继续烧结工作；否则执行下一步骤；当两个或两个以上的轴镜的工作状态异常,或者任一轴镜在预设时间内累计出现3次以上的工作状态异常,停止烧结并发出报警信息以提醒用户,结束流程；否则将出现异常的轴镜进行复位；当复位后,重新获取扫描系统中每一轴镜的工作状态,并返回执行上述步骤二。本发明根据轴镜出现异常的数量以及出现异常的频率选择复位或停止烧结的处理,这样可在避免烧结不合格制件,浪费粉末材料和烧结时间弊端的前提下,尽可能提高设备打印工作效率。(A fault handling method, a fault handling device and an additive manufacturing device for a scanning system are provided, wherein the fault handling method for the scanning system comprises the following steps: acquiring the working state of each axial mirror in the scanning system; when the working states of all the axial mirrors of the scanning system are normal, the sintering operation is continued; otherwise, executing the next step; when the working states of two or more than two axial mirrors are abnormal or more than 3 times of working state abnormality is accumulated in a preset time of any axial mirror, stopping sintering and sending alarm information to remind a user to finish the process; otherwise, resetting the abnormal axial lens; and after resetting, acquiring the working state of each axis mirror in the scanning system again, and returning to execute the second step. According to the invention, the reset or stop sintering treatment is selected according to the abnormal quantity and abnormal frequency of the axicons, so that the printing working efficiency of the equipment can be improved as much as possible on the premise of avoiding the defects of unqualified workpiece sintering, powder material waste and sintering time waste.)

1. A fault handling method for a scanning system, comprising the steps of:

step one, acquiring the working state of each axis mirror in a scanning system;

step two, when the working states of all the axis mirrors of the scanning system are normal, continuing the sintering work and ending the process; otherwise, executing the next step;

step three, when the working states of two or more than two axial mirrors are abnormal, or more than 3 times of working state abnormality is accumulated in a preset time of any axial mirror, stopping sintering, sending alarm information to remind a user, and ending the process; otherwise, resetting the abnormal axial lens;

and step four, after resetting, reacquiring the working state of each axis mirror in the scanning system, and returning to execute the step two.

2. The fault handling method for a scanning system according to claim 1, wherein when the working states of all the axis mirrors in the scanning system are normal after resetting, the forming cylinder does not descend, and the powder spreading device continues sintering after spreading powder again.

3. The fault handling method for a scanning system according to claim 2, wherein the method further comprises:

when the working state of any axial mirror is abnormal, the current time of the axial mirror with the abnormality is recorded and stored to form a fault record table.

4. The method for processing faults of a scanning system according to claim 1, wherein when the scanning system comprises a galvanometer unit in an operating state and a galvanometer unit in a non-operating state, the galvanometer unit comprises two or more axicons, each galvanometer unit can cover the whole working area, and after sintering is stopped and alarm information is sent out, and before the process is finished, the method further comprises the following steps:

the galvanometer unit in a non-working state in the switching scanning system works.

5. The fault handling method for a scanning system according to any one of claims 1 to 4, wherein the preset time is 1 day to 15 days.

6. A fault handling apparatus for a scanning system, comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the fault handling method for a scanning system according to any one of claims 1 to 5 when executing the computer program.

7. An additive manufacturing apparatus comprising the fault handling device for a scanning system of claim 6.

8. Additive manufacturing apparatus according to claim 7, wherein the steps of the fault handling method for a scanning system according to any one of claims 1 to 5 are implemented when the scanning system comprises an active galvanometer unit and an inactive galvanometer unit, the galvanometer unit comprising two or more axicons, the fault handling means for a scanning system executing the computer program only for the active galvanometer unit.

Technical Field

The invention relates to the technical field of three-dimensional object manufacturing, in particular to a fault processing method and device for a scanning system and additive manufacturing equipment.

Background

Additive Manufacturing (AM) is an advanced Manufacturing technology with the advantages of digital Manufacturing, high flexibility and adaptability, direct CAD model driving, rapidness, rich and diverse material types, and the like. Among them, Selective Laser Melting (SLM) is one of the additive manufacturing technologies that have been rapidly developed in recent years, and the basic process is as follows: the upper powder feeding device feeds a certain amount of metal powder to a working table, a layer of powder material is flatly laid on the upper surface of a formed part of a forming cylinder by a conventional powder laying and scraping mechanism, and a scanning system controls a laser to scan a powder layer of a solid part according to the section outline of the layer, so that the powder is melted and is bonded with the formed part below the powder layer; after the section of one layer is sintered, the working table is lowered by the thickness of one layer, the powder spreading and scraping mechanism is used for spreading a layer of uniform and compact powder on the working table, scanning sintering is carried out on the section of a new layer, and the new layer is scanned and overlapped by a plurality of layers until the whole prototype manufacturing is completed.

The additive manufacturing equipment belongs to full-automatic equipment, and a printing process of the additive manufacturing equipment can automatically finish printing a workpiece without the participation of an operator. Due to the fact that the device is used, labor cost is greatly reduced, and working efficiency is improved. However, the problem of defective printed parts due to failure of the scanning system is often caused, and a general solution to failure of the scanning system in the prior art is to immediately stop printing, detect and process the failure, which may reduce printing efficiency while stopping printing in time and avoiding waste of powder.

Disclosure of Invention

Based on the method, the device and the additive manufacturing equipment, the fault processing method and the device for the scanning system can improve the printing efficiency as much as possible on the premise of reducing powder waste.

In order to achieve the above object, the present invention provides a fault handling method for a scanning system, comprising the steps of:

step one, acquiring the working state of each axis mirror in a scanning system;

step two, when the working states of all the axis mirrors of the scanning system are normal, continuing the sintering work and ending the process; otherwise, executing the next step;

step three, when the working states of two or more than two axial mirrors are abnormal, or more than 3 times of working state abnormality is accumulated in a preset time of any axial mirror, stopping sintering, sending alarm information to remind a user, and ending the process; otherwise, resetting the abnormal axial lens;

and step four, after resetting, reacquiring the working state of each axis mirror in the scanning system, and returning to execute the step two.

As a further preferable scheme of the present invention, after the reset, when the working states of all the axis mirrors in the scanning system are normal, the forming cylinder does not descend, and the powder spreading device continues sintering after spreading powder again.

As a further preferable aspect of the present invention, the method further comprises:

when the working state of any axial mirror is abnormal, the current time of the axial mirror with the abnormality is recorded and stored to form a fault record table.

As a further preferable aspect of the present invention, when the scanning system includes a galvanometer unit in an operating state and a galvanometer unit in a non-operating state, the galvanometer unit includes two or more axicons, and each galvanometer unit can cover the whole operating area, after the sintering is stopped and the alarm information is sent out, and before the process is finished, the method further includes:

the galvanometer unit in a non-working state in the switching scanning system works.

As a further preferable embodiment of the present invention, the preset time is 1 day to 15 days.

The invention also provides a fault handling device for a scanning system, which comprises a memory and a processor, wherein the memory stores a computer program, and the fault handling device is characterized in that the processor implements the steps of any one of the fault handling methods for the scanning system when executing the computer program.

The invention also provides an additive manufacturing device which comprises the fault processing device for the scanning system.

As a further preferable aspect of the present invention, the steps of the failure processing method for a scanning system according to any one of claims 1 to 5 are implemented when the scanning system includes a galvanometer unit in an operating state and a galvanometer unit in a non-operating state, the galvanometer unit includes two or more axicons, and the failure processing device for a scanning system executes the computer program only for the galvanometer unit in the operating state.

The invention discloses a fault handling method and device for a scanning system and an additive manufacturing device, wherein the fault handling method for the scanning system comprises the following steps: acquiring the working state of each axial mirror in the scanning system; when the working states of all the axial mirrors of the scanning system are normal, continuing sintering work and ending the process; otherwise, executing the next step; when the working states of two or more than two axial mirrors are abnormal or more than 3 times of working state abnormality is accumulated in a preset time of any axial mirror, stopping sintering and sending alarm information to remind a user to finish the process; otherwise, resetting the abnormal axial lens; and after resetting, acquiring the working state of each axis mirror in the scanning system again, and returning to execute the second step. According to the invention, the reset or stop sintering treatment is selected according to the abnormal quantity and abnormal frequency of the axicons, so that the printing working efficiency of the equipment can be improved as much as possible on the premise of avoiding the defects of unqualified workpiece sintering, powder material waste and sintering time waste. Because all faults can not be solved by resetting or stopping sintering, the invention considers the efficiency of fault solving and the working efficiency.

Drawings

Fig. 1 is a flowchart of a method of an embodiment of the invention for providing a fault handling method for a scanning system.

Detailed Description

In order that the invention may be more fully understood, a more particular description of the invention will now be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, an embodiment of the present application provides a fault handling method for a scanning system, which includes the following steps:

step 11, acquiring the working state of each axis mirror in the scanning system; in this step, the operating state information of the axis mirror can be read and obtained, for example, when the operating state information of a certain axis mirror is "1", it indicates that the operating state of the axis mirror is abnormal; the working state information of the axicon is '0', which indicates that the working state of the axicon is normal; it should be noted that, in the present invention, the axial mirrors in steps 11 to 14 all refer to the axial mirrors in a working state, and if the scanning system further includes an axial mirror in a non-working state, the axial mirror does not belong to the axial mirrors mentioned in steps 11 to 14, and the working state is assigned to work, and certainly it is not always at the working time, for example, a certain galvanometer unit also belongs to the working state after the scanning is completed, i.e. during the process of waiting for scanning; the non-operating state refers to the state of being assigned to operate, and generally, when the scanning system comprises a plurality of galvanometer units, part of the galvanometer units are in the operating state, and part of the galvanometer units are in the non-operating state (for standby). In addition, the step 11 may be executed during the scanning process for the operating axis mirror, or may be executed after the scanning process is completed, i.e., during the scanning process.

Step 12, judging whether the working states of all the axis mirrors of the scanning system are normal or not, if so, executing step 13, otherwise, executing step 14, wherein if not, the working state of any axis mirror in the scanning system is abnormal, and at the moment, executing the next step;

step 13, continuing the sintering work and ending the process;

step 14, judging whether the working states of two or more than two axial mirrors are abnormal or not, or whether the working states of any axial mirror are abnormal for more than 3 times in a cumulative way within a preset time, if the working states are abnormal, executing step 15, otherwise executing step 16;

step 15, stopping sintering, sending alarm information to remind a user, and ending the process;

step 16, resetting the abnormal axicon; the preset time can be set by a designer according to specific requirements, for example, according to the requirement on the stability of the scanning system, that is, if the requirement on the stability of the scanning system is higher, the preset time can be set to be shorter; conversely, if the stability requirement for the scanning system is lower, the preset time may be set longer, specifically, the preset time is 1 day to 15 days.

And step 17, after resetting, reacquiring the working state of each axis mirror in the scanning system, and returning to execute the step 12.

According to the fault processing method for the scanning system, the reset or stop sintering processing is selected according to the number of the shaft mirrors with the abnormality and the frequency of the abnormality, so that the printing working efficiency of the equipment can be improved as much as possible on the premise of avoiding the defects of sintering unqualified parts, wasting powder materials and sintering time. Because all faults can not be solved by resetting or stopping sintering, the invention considers the efficiency of fault solving and the working efficiency.

Preferably, after resetting, when the working states of all the axis mirrors in the scanning system are normal, the forming cylinder does not descend, the powder spreading device continues to sinter after spreading powder again, and large-particle powder left after scanning failure can be pushed to the powder overflowing cylinder due to the fact that powder is spread again, so that sintering quality is prevented from being influenced; and by spreading the powder again, the surface of the layer of powder is ensured to be finished, the phenomenon of deficiency is avoided, and the powder sintering quality is further ensured.

Further preferably, the method further comprises: when the working state of any axial mirror is abnormal, recording and storing the current time when the axial mirror is abnormal to form a fault recording table, so that a user of the additive manufacturing equipment can conveniently check the fault occurrence frequency of each axial mirror at any time, and the stable condition of the scanning system in the additive manufacturing equipment can be judged; and a reference basis for selecting the model of the galvanometer unit can be provided for manufacturers of additive manufacturing equipment, so that the working stability of the equipment is further improved. For example, when the failure rate of a certain type of galvanometer unit is low, the galvanometer unit of the new type is preferentially selected.

In order to further improve the working efficiency of the equipment, when the scanning system comprises a galvanometer unit in a working state and a galvanometer unit in a non-working state, the galvanometer unit comprises two or more than two axicons, and each galvanometer unit can cover the whole working area, after sintering is stopped and alarm information is sent out, and before the process is finished, the method further comprises the following steps:

the galvanometer unit in a non-working state in the switching scanning system works. It should be noted that, at this time, the galvanometer unit in the non-operating state is in the operating state.

The invention further provides a fault handling device for a scanning system, which comprises a memory and a processor, wherein the memory stores a computer program, and the fault handling device is characterized in that the processor implements the steps of the fault handling method for the scanning system according to any one of the embodiments when executing the computer program.

The invention also provides an additive manufacturing device which comprises the fault processing device for the scanning system.

As a preferable aspect of the present invention, when the scanning system includes a galvanometer unit in an operating state and a galvanometer unit in a non-operating state, the galvanometer unit includes two or more axicons, and the fault processing apparatus for the scanning system executes the computer program only for the galvanometer unit in the operating state, the steps of the fault processing method for the scanning system described in any of the above embodiments are implemented. That is, the failure handling method for a scanning system of the present invention is directed only to the galvanometer unit in an operating state.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.