CMM 3D Print Head Retrofit With Thermal Isolation for Large Parts
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Solution Overview
Problem
Current 3D printing technologies face challenges in fabricating large thermoplastic objects due to limitations in precision positioning frames, nozzle diameter, and non-uniform temperature issues that affect adhesion and scalability, making it difficult to print objects larger than 250mm cubes efficiently.
Innovation Solution
A CMM system is retrofitted with a 3D print head and a thermally insulating bracket to protect the arm from heat, combined with a controllable heat bed for optimal temperature control, allowing the CMM to function as both a 3D printer and a metrology device, enabling large-scale printing while minimizing damage to the sensitive measurement equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a CMM arm is used as a positioning frame for 3D printing, then large-scale printing capability is achieved, but the arm is damaged by heat from the print head
Solution Approach 1:
A thermally insulating bracket is introduced as an intermediary component between the 3D print head and the CMM arm. This bracket made from thermally insulating material blocks the heat transfer path, protecting the arm from thermal damage while allowing the system to maintain large printing volume capability.
2Adaptability or versatility
If the CMM system is used for both metrology and 3D printing, then device versatility is improved, but device complexity increases
Solution Approach 1:
The CMM system is designed with universal adaptability to perform both metrology measurements and 3D printing functions. The positioning frame can accommodate different toolheads (measurement probes or print heads), and the control system can switch between measurement software and printing software, allowing one device to serve multiple purposes without requiring separate dedicated equipment.
3Manufacturing precision
If temperature control is added to the heat bed, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The heat bed incorporates temperature control capability to maintain optimal printing temperatures for different materials and conditions. By adjusting and controlling the temperature parameter of the heat bed, the system achieves improved layer adhesion and manufacturing precision, with the control system automatically managing temperature based on preset parameters for different printing scenarios.
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 efficient printing of larger objects by maintaining precise temperature control and reducing thermal interference, allowing for scalable and precise fabrication beyond the limitations of traditional 3D printing technologies.
Implementation Method 1
a thermal insulator between the print head and the CMM arm
Implementation Method 2
a controllable heat bed for optimal temperature control
Data Source
Figure 1A
Figure 1B
Figure 2a
AI summary
A CMM system has a CMM arm movable in at least three degrees of freedom, a 3D print head removably couplable with the CMM arm, and a thermal insulator between the print head and the CMM arm.