Lamination Molding Apparatus Program Resumption Control
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Solution Overview
Problem
The lamination molding process, which involves forming and sintering material powder layers using a laser beam, often experiences interruptions due to errors or emergencies, leading to discrepancies in the molding table position and program sequence, resulting in potential collisions and wasted processes upon resumption.
Innovation Solution
A lamination molding apparatus equipped with a numerical control system that compares and adjusts the molding table height and program sequence numbers to ensure accurate resumption, preventing collisions and minimizing process losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main program is interrupted due to error or emergency, then the motor control signal is disconnected and the molding table moves to a safe position, but the molding table position and program sequence become inconsistent upon resumption
Solution Approach 1:
The control device stores the molding table position and program sequence number at the time of suspension, then compares these stored values with the current position and sequence number upon resumption. This feedback mechanism detects inconsistencies and prevents erroneous execution, resolving the contradiction between safety movement and position accuracy.
Solution Approach 2:
Before resuming the program, the control device performs preliminary comparison of the stored position and sequence number with current values. This preliminary action ensures that the molding table is at the correct position and the program sequence is synchronized before continuing execution, preventing position accuracy errors.
2Ease of operation
If the operator manually sets the resumption position and program sequence number, then flexibility is provided, but mistakes may occur leading to wasted molding processes
Solution Approach 1:
The control device automatically retrieves and compares the stored position and program sequence number with current values upon resumption. This self-service mechanism eliminates the need for manual operator input, preventing mistakes while maintaining operational flexibility. The system serves itself by automatically detecting and correcting position and sequence discrepancies.
3Reliability
If the molding table position is not accurately controlled upon resumption, then collision avoidance is compromised, but maintaining strict position control increases system complexity
Solution Approach 1:
The control device uses feedback by comparing stored position data with current position sensors upon program resumption. This feedback ensures the molding table is at the correct position before continuing, maintaining collision avoidance without requiring complex real-time control systems during normal operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables seamless resumption of the main program after interruptions, reducing the risk of collisions and material waste by ensuring precise alignment and sequence synchronization.
Implementation Method 1
irradiating a predetermined area of the material powder layer with a laser beam to form a sintered layer
Implementation Method 2
irradiating a predetermined area of the material powder layer with a laser beam, thereby sintering the material powder
Data Source
AI summary
A lamination molding apparatus, including a numerical control apparatus configured to form a desired lamination molding object by a repetition in accordance with a main program pre-created and numbered with a sequence number, the main program including a plurality of program lines, wherein the repetition includes forming a material powder layer of a predetermined thickness on a molding table for each divided layer, the molding table being vertically movable, the divided layer being obtained by dividing a shape of the desired lamination molding object at the predetermined thickness; and irradiating a predetermined area of the material powder layer with a laser beam to form a sintered layer.