Coaxial Drive Compression Drawing Device for Flat Fibrous Materials
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Solution Overview
Problem
Current compression drawing machines for fiber materials, such as cardboard, face limitations in high-speed operation due to the need for precise heat introduction, high pressure application, and exact tool alignment, leading to complex and rigid machine structures that hinder efficient production of high-quality 3D molded parts with complex geometries.
Innovation Solution
A device with a coaxial drive system where the blank holder and punch drives are arranged coaxially, allowing a single, less rigid guide for the blank holder, and a ram guide cylinder interacts with a ram guide bushing for precise movement, minimizing machine size and maximizing spatial freedom while maintaining accuracy and rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional separate drives for punch and blank holder are used, then precise control of each component is achieved, but device complexity and machine size increase
Solution Approach 1:
The patent combines the punch drive and blank holder drive into a single coaxial drive unit. The punch and blank holder are driven simultaneously by one motor through a integrated transmission mechanism, eliminating the need for separate drive systems. This merging reduces device complexity while the coaxial design ensures precise alignment between the punch and blank holder during operation.
Solution Approach 2:
The patent employs a nested arrangement where the punch is positioned inside the blank holder, and both are contained within a single drive mechanism. The punch guide cylinder and blank holder guide structure are nested within the same housing, creating a compact integrated system that reduces overall machine size while maintaining precise relative positioning.
2Manufacturing precision
If rigid guides are used for punch and blank holder, then movement precision is maintained, but machine size and weight increase
Solution Approach 1:
The patent replaces traditional rigid guide structures with flexible guide elements. The punch guide cylinder and blank holder guide use flexible but precision-maintaining components that can accommodate minor misalignments while preserving movement accuracy. This reduces the overall size and weight of the guide system compared to conventional rigid guides.
3Manufacturing precision
If high pressure application and exact tool alignment are required, then high-quality molded parts are produced, but machine structure becomes complex and rigid
Solution Approach 1:
The patent integrates the pressure application mechanism and alignment system into a unified coaxial drive structure. The single drive unit simultaneously controls both the punch and blank holder, ensuring they remain precisely aligned while applying high pressure during the molding process. This eliminates the need for separate alignment and pressure control systems.
Solution Approach 2:
The coaxial drive system creates an equipotential arrangement where the punch and blank holder are positioned symmetrically around the same axis. This geometric symmetry ensures automatic alignment and equal force distribution, maintaining molded part quality without requiring complex adjustment mechanisms or rigid structural supports.
Data Source
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AI summary
Device for compression drawing of planar fibrous material, comprising a longitudinally movably guided punch (121, 221, 521) with a punch guide cylinder (126, 226), and a pleat holder (123, 223, 523) with a pleat holder guide cylinder (124, 224) which is longitudinally movably guided in a pleat holder guide bushing (104, 204) connected to a frame (108, 208, 508), wherein the punch symmetry axis and the pleat holder symmetry axis have the same position, the pleat holder guide bushing is integrally connected to at least one first pleat holder actuator element (118, 218) to form a pleat holder stator (112a, 212a), and the pleat holder guide cylinder is integrally connected to at least one second pleat holder actuator element (119) to form a pleat holder runner (112b, 212b). 219) is integrally connected, wherein the pleat holder stator and the pleat holder rotor form a pleat holder drive, the punch guide bushing (106, 206) to form a punch stator (110a,210a) is integrally connected to a first punch actuator element (116, 216), the punch guide cylinder (126, 226) is integrally connected to a second punch actuator element (117, 217) to form a punch runner (110b, 210b), wherein the punch stator and the punch runner form a punch drive, wherein the pleat holder stator (112a, 212a) is fixedly connected to the frame, and wherein the punch stator (110a, 210a) is fixedly connected to the frame (208, 508) or integrally connected to the pleat holder guide cylinder (124), and the pleat holder guide cylinder (124) simultaneously forms the punch guide bushing (106) in which the punch runner (110b) is longitudinally movably mounted.