Multi-channel piezoelectric type 3D printing spraying head fault identification and state monitor system and method
A condition monitoring system and 3D printing technology, applied in manufacturing auxiliary devices, processing data acquisition/processing, additive processing, etc., can solve problems such as inability to effectively identify fault types, inability to monitor droplet velocity, and unfavorable corresponding measures. Achieve the effects of saving measurement time and space, improving detection accuracy, and small overall size
A condition monitoring system and 3D printing technology, applied in manufacturing auxiliary devices, processing data acquisition/processing, additive processing, etc., can solve problems such as inability to effectively identify fault types, inability to monitor droplet velocity, and unfavorable corresponding measures. Achieve the effects of saving measurement time and space, improving detection accuracy, and small overall size
CN110370648AActive Publication Date: 2019-10-25XI AN JIAOTONG UNIV
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[0041] The present invention provides a multi-channel piezoelectric 3D printing nozzle fault identification and state monitoring system and method, using the self-induction detection method to convert the residual vibration signal in the flow channel cavity of the piezoelectric nozzle into a voltage signal for collection and analysis to obtain each The corresponding characteristic parameters when a fault occurs. If the characteristic parameter exceeds the threshold, it indicates that a fault has occurred. Judging the type of fault through the indicator light is convenient for taking processing measures. Compared with the traditional video-based spraying state monitoring method, the present invention can realize the monitoring of the spraying state of the spraying head during the printing process of the spraying head, without being limited by the position of the spraying head; Status monitoring greatly reduces hardware costs, improves detection efficiency and ensures the stabili...
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The invention discloses a multi-channel piezoelectric type 3D printing spraying head fault identification and state monitor system and method. The system comprises a spraying head drive circuit, a multi-channel strobe circuit, a piezoelectric signal collecting circuit and a monitoring unit. The spraying head drive circuit is used for providing drive signals to enable a piezoelectric spraying headto carry out spraying. The multi-channel strobe circuit is used for providing multi-channel alternating strobe signals to achieve alternating monitoring over multiple spraying holes of the piezoelectric spraying head. The piezoelectric signal collecting circuit utilizes the self-inducting and detecting manner to collect residual vibration signals in a piezoelectric spraying head runner cavity. Themonitoring unit comprises a drive voltage monitoring module, a liquid viscosity monitoring module, an ink supply pressure monitoring module and a drop spraying speed calculation module and used for monitoring the working state of the piezoelectric spraying head. The system can effectively identify the fault type and the generation reason, the monitoring accuracy is improved, and users can adopt effective measures conveniently. Meanwhile, an external sensor is not needed, and the hardware cost is reduced by means of the alternating monitoring manner. Monitoring can be carried out in the working process of the spraying head, and the monitoring flexibility is improved.
Description
technical field [0001] The invention belongs to the field of advanced manufacturing technology, and in particular relates to a multi-channel piezoelectric 3D printing nozzle fault identification and state monitoring system and method. Background technique [0002] 3D printing is a revolutionary manufacturing method that has been developed since the mid-1990s. Based on the principle of material accumulation molding, starting from the 3D CAD model of the part, the model is discretized, sliced ββand layered, and then the 2D data is manufactured layer by layer and finally accumulated into a 3D entity to realize the workpiece molding manufacturing. Droplet jetting technology is widely used in 3D printing. However, because the nozzle is a precision device, it is very easy to cause jetting failures such as driving voltage overrun, high-viscosity plugging, and ink supply pressure imbalance. Currently, such failures can only be detected under ink viewing equipment. It was found that...
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Patent Timeline
25 Oct 2019
Publication
CN110370648A
- IPC
- B29C64/393; B29C64/386; B33Y50/00; B33Y50/02
- CPC
- B33Y50/00; B33Y50/02; B29C64/386; B29C64/393
- Inventors
- ηθ; θ‘θͺι