Conical Coupling for SLM Part Re-machining
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Solution Overview
Problem
The re-machining of semifinished products obtained by selective laser melting is currently unreliable and complex, requiring long preparation times and often resulting in unsatisfactory surface quality and dimensional accuracy.
Innovation Solution
A process involving the preparation of supporting arms with conical coupling means for precise centring and fixation to gripping equipment, which includes conical fixing sockets and holes, allowing for reliable and precise re-machining by enabling perfect alignment and avoiding interference during the machining process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional gripping methods are used for re-machining semifinished products, then the preparation process is simple, but the re-machining reliability and precision are poor
Solution Approach 1:
The patent applies preliminary action by integrating the preparation of centring features directly into the selective laser melting manufacturing process. Supporting arms with conical coupling features are prepared during the additive manufacturing step itself, rather than requiring separate post-processing operations. This preliminary preparation enables precise centring and reliable re-machining while avoiding complex external gripping equipment.
Solution Approach 2:
The patent introduces an intermediary conical coupling mechanism that mediates between the semifinished product and the gripping equipment. The conical interface acts as a precise positioning intermediary, enabling accurate centring and alignment during re-machining operations. This intermediary structure resolves the contradiction by providing reliable positioning without requiring complex gripping systems.
2Manufacturing precision
If conventional re-machining processes are used, then the equipment setup is simple, but the preparation time is long and precision is poor
Solution Approach 1:
The conical coupling features and supporting arms are prepared during the selective laser melting process itself, before the re-machining operation begins. This preliminary action eliminates the need for time-consuming setup and alignment operations, reducing preparation time while ensuring high dimensional accuracy through the precise conical geometry.
Solution Approach 2:
The patent changes the geometric parameters of the coupling interface by using conical surfaces instead of conventional flat or cylindrical interfaces. The conical geometry provides self-centring properties and precise angular positioning, which improve dimensional accuracy while reducing the time required for setup and alignment during re-machining operations.
3Measurement precision
If conventional gripping equipment is used, then the equipment structure is simple, but the centring precision and alignment are insufficient
Solution Approach 1:
The centring features are prepared in advance during the selective laser melting process, integrating the precision centring function into the manufacturing step itself. This eliminates the need for complex external centring equipment and achieves high measurement precision through the precisely controlled conical geometry created during additive manufacturing.
Solution Approach 2:
The patent uses conical surfaces (curved geometric forms) for the coupling interface instead of conventional flat or linear features. The conical geometry provides inherent self-centring properties and precise angular positioning, achieving high centring precision while maintaining relatively simple equipment structure through the use of elegant curved surfaces.
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
This approach enables rapid, reliable, and precise re-machining of semifinished products, improving surface quality and dimensional accuracy by ensuring optimal centring and alignment between the semifinished product and the gripping equipment.
Implementation Method 1
selective micro-melting by a beam laser of a layer of metallic powder with controlled grain size in such a way as to make thin layers of superposed molten/solidified metal
Implementation Method 2
selective micro-melting by a beam laser of a layer of metallic powder
Data Source
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AI summary
Described is a process for picking up a semifinished product (100) obtained by selective laser melting comprises preparing in the course of the selective laser melting a plurality of supporting arms (103) of the semifinished product (100) ending with a fixing socket (104) designed to be fixed to gripping equipment (1) using screws (4). The fixing socket (104) is equipped with a first portion of the conical coupling means. The process also comprises making the gripping equipment (1) directly in a removal machine generating a plurality of fixing holes (3) provided with a second portion of the conical coupling means. The semifinished product (100) is picked up on the removal machine centring each fixing socket (104) with respect to the relative fixing hole (3) using the respective conical coupling means and fixing each supporting arm (103) to the gripping equipment (1) at the respective fixing hole (3) by means of screws (4).