Replaceable Cylinder for Quick-Clamping Device Corrosion
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Solution Overview
Problem
Quick-action clamping devices suffer from severe corrosion in the housing, particularly in the cylinder walls, making repairs difficult and often requiring the entire device to be replaced, especially when the locking device is damaged, leading to issues with sealing and pressure oil leakage.
Innovation Solution
A pot-shaped, rustproof replacement cylinder is inserted into the housing, forming the running surfaces for the piston and spring chamber, which can be easily exchanged, and the spring chamber is filled with protective oil to prevent corrosion and ensure lubrication, allowing for a corrosion-free and self-lubricated operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the housing is used as the cylinder for the piston, then the device structure is simple, but the cylinder walls are susceptible to corrosion and damage
Solution Approach 1:
The housing is divided into two functional parts: the outer housing structure and the inner replaceable cylinder. The cylinder can be independently removed and replaced without replacing the entire housing, allowing the corrosion-prone cylinder to be maintained separately from the permanent housing structure.
Solution Approach 2:
The cylinder material is changed from standard housing material to a corrosion-resistant material suitable for hydraulic fluid exposure. This material parameter change ensures the cylinder walls resist corrosion from pressure oil while maintaining the overall device structure.
2Reliability
If the entire quick-release device is replaced when the locking device is damaged, then reliability is restored, but repair cost and complexity increase
Solution Approach 1:
The device is segmented into replaceable modules: the cylinder, piston, locking device, and seal set. When the locking device or piston is damaged, only these specific components need to be replaced rather than the entire housing, significantly reducing repair complexity and cost.
Solution Approach 2:
The piston and locking device are designed as consumable components that can be discarded when damaged and easily replaced. The permanent housing structure is recovered and reused, maximizing component utilization and minimizing waste.
3Device complexity
If the spring chamber is filled with air, then the device is simple, but moisture ingress causes corrosion
Solution Approach 1:
The spring chamber is filled with dry nitrogen gas instead of air. Nitrogen is inert and does not contain moisture, creating a corrosion-free environment for the spring assembly and internal cylinder surfaces while maintaining atmospheric pressure in the chamber.
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 solution significantly reduces the risk of corrosion, simplifies repairs by allowing the replacement of only the cylinder, and prevents self-locking of the device, ensuring reliable operation and reduced maintenance efforts.
Implementation Method 1
the spring chamber is filled with protective oil to prevent corrosion and ensure lubrication
Implementation Method 2
a pressure medium is introduced into the cylinder chamber against the force of the spring assembly, moves the piston into its release position
Data Source
AI summary
The quick-clamping device (1) has a cylinder housing with cap (3) screwed to the top of a closing plate or to a machine table (18) by screws (21) and including a receiving aperture leading to the drawing-in nipple. An exchange cylinder (20) is sealed into the device housing to form the running surfaces for a piston (6) and the spring cavity for a spring pack (12).