Printing Drum Support Assembly with Adjustable Pre-Tensioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drum support assemblies in printing machines face a conflict between high positioning precision, vibration dampening, and compensation for wear, defects, and thermal expansion, with rigid assemblies providing precision but poor dampening, and resilient assemblies offering compensation but reduced precision.
Innovation Solution
A drum support assembly with a pre-tensioning unit that pre-tensions the drum support body against guides, incorporating a spring element and pressure piece to provide precise positioning, vibration dampening, and compensation for wear and thermal expansion, using a pre-tensioning force that adjusts to specific needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the drum support assembly is made rigid for precise positioning, then positioning precision is improved, but vibration dampening capability deteriorates
Solution Approach 1:
The patent applies dynamics by making the drum support assembly adjustable between rigid and resilient states. The support assembly can be switched from a first state (rigid, high positioning precision) to a second state (resilient, high vibration dampening) depending on operational requirements. This resolves the contradiction by allowing the system to adapt its mechanical properties dynamically rather than being fixed in one configuration.
Solution Approach 2:
The patent changes the mechanical parameter of the drum support assembly (rigidity/resilience) to resolve the contradiction. By adjusting the support assembly between rigid and resilient states, the system can optimize for either positioning precision or vibration dampening as needed, eliminating the need to permanently compromise one function for the other.
2Reliability
If the drum support assembly is made resilient for compensation of wear and thermal expansion, then compensation capability is improved, but positioning precision deteriorates
Solution Approach 1:
The patent applies dynamics by making the drum support assembly adjustable between rigid and resilient states. The support assembly can be switched from a first state (rigid, high positioning precision) to a second state (resilient, high vibration dampening) depending on operational requirements. This resolves the contradiction by allowing the system to adapt its mechanical properties dynamically rather than being fixed in one configuration.
Solution Approach 2:
The patent changes the mechanical parameter of the drum support assembly (rigidity/resilience) to resolve the contradiction. By adjusting the support assembly between rigid and resilient states, the system can optimize for either positioning precision or vibration dampening as needed, eliminating the need to permanently compromise one function for the other.
3Measurement precision
If the drum support assembly is made rigid for precise positioning, then positioning precision is improved, but compensation of wear and thermal expansion deteriorates
Solution Approach 1:
The patent applies dynamics by making the drum support assembly adjustable between rigid and resilient states. The support assembly can be switched from a first state (rigid, high positioning precision) to a second state (resilient, high vibration dampening) depending on operational requirements. This resolves the contradiction by allowing the system to adapt its mechanical properties dynamically rather than being fixed in one configuration.
Solution Approach 2:
The patent changes the mechanical parameter of the drum support assembly (rigidity/resilience) to resolve the contradiction. By adjusting the support assembly between rigid and resilient states, the system can optimize for either positioning precision or vibration dampening as needed, eliminating the need to permanently compromise one function for the other.
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
The assembly achieves high precision positioning, effective vibration dampening, and compensation for wear and thermal expansion, ensuring reliable and precise drum support with adjustable pre-tensioning force for various operational conditions.
Implementation Method 1
the pre-tensioning unit comprises a pressure piece and a spring element, wherein the spring element is adapted for applying a spring force on the pressure piece
Implementation Method 2
Vibrations usually enter the drum support assembly via the drum support body. Before they can propagate into the upper or lower guide, they act against the pre-tensioning force provided by the pre-tensioning unit. Consequently, such vibrations are dampened by temporarily and locally altering the pre-tensioning force.
Implementation Method 3
In this context the effect of wear, a defects and/or thermal expansion also acts on the pre-tensioning force, i.e. wear, a defect and/or thermal expansion lead to a reduced or increased pre-tensioning force.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A drum support assembly (30, 32) for a printing machine is presented. It comprises a drum support body (30a, 32a) having a bearing interface (30b, 32b) for a drum, a lower guide (34) supporting the drum support body (30a, 32a) at a lower end thereof, and an upper guide (36) supporting the drum support body (30a, 32a) at an upper end thereof. Additionally, a pre-tensioning unit (50) is provided pre-tensioning the drum support body (30a, 32a) against the lower guide (34) and/or the upper guide (36). Furthermore, a printing machine is described, comprising a drum and a drum support assembly (30, 32) as described above.