Pneumatic Sanding Machine Thrust Elements
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Solution Overview
Problem
Existing sanding machines for wood or metal panels often apply excessive pressure with the abrasive belt, which can damage the panels despite being higher than necessary for proper functioning, leading to inefficiencies and potential damage.
Innovation Solution
The sanding machine incorporates a pneumatic actuator cylinder system with a single valve for each thrust element, where the lower chamber is constantly pressurized and the upper chamber is selectively pressurized to maintain contact with the panel using reduced pressure, ensuring the abrasive belt contacts the panel with pressure equal to or less than that required for the panel's profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the abrasive belt is kept in contact with the panels by a relatively high pressure, then the sanding function is ensured, but the panels may be damaged
Solution Approach 1:
The thrust elements are made movable between lowered operating positions and raised rest positions through pneumatic actuator cylinders. This dynamic adjustment allows the abrasive belt to apply pressure only when needed for sanding, and to release pressure to prevent panel damage, resolving the contradiction between ensuring sanding function and preventing harmful effects.
2Reliability
If two valves are mounted on each actuator cylinder to control both chambers, then the pressure control is complete, but the device complexity increases
Solution Approach 1:
A single pneumatic feeding device with a dual-output manifold is used to supply pressurized gas to both the upper and lower chambers of the actuator cylinders. This merging of the pressure supply system eliminates the need for separate valves on each cylinder, reducing device complexity while maintaining complete pressure control through the shared manifold system.
Solution Approach 2:
The single pneumatic feeding device serves multiple functions by distributing pressurized gas to both chambers of multiple actuator cylinders through the manifold system. This multi-functional design replaces what would otherwise require multiple individual valve assemblies, simplifying the overall device structure.
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 design reduces the pressure applied by the abrasive belt, preventing damage to the panels while maintaining effective sanding by ensuring the belt contacts the panel with a pressure equal to or less than that needed for the panel's profile, thus enhancing the sanding process's efficiency and safety.
Implementation Method 1
The thrust elements are fixed to the output rods of respective pneumatic actuator cylinders, and are selectively moved into their lowered operating positions according to the width of the panel.
Implementation Method 2
an abrasive belt wound in a ring shape around a plurality of idler rollers for sanding an upper face of the panel
Data Source
Figure 1
Figure 2
AI summary
In a sanding machine for sanding/finishing panels (2) made of wood, metal or the like, an abrasive belt (11) is moved in contact with a panel (2) by a plurality of thrust elements (20) which are distributed within the abrasive belt (11) and are moved perpendicularly to the panel (2) by respective actuator cylinders (22), each of which has an output rod (28) movable under the thrust of a pressurized gas selectively fed into two chambers (31, 32) from a single supply manifold (34); each chamber (31, 32) communicating with an outlet (39) of the pressurized gas into the external environment.