Sealing Screw Surface Correction and Leak Testing
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Solution Overview
Problem
Sealing screws made of metal, particularly those treated as bulk goods, often suffer from manufacturing defects such as notches and bumps on their sealing surfaces, leading to leakage issues when used without elastomeric seals, especially during cold extrusion processes.
Innovation Solution
A combined sealing surface correction and leak testing device that uses hydraulic or electromotive forming means to deform and correct the sealing surface, accompanied by a test chamber to apply pressure and verify the sealing effectiveness, ensuring the screw's tightness by applying a forming force perpendicular to the sealing surface and using compressed air to simulate real-world conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sealing screws are produced by cold extrusion and treated as bulk goods, then productivity is improved, but manufacturing precision deteriorates due to notches and bumps on the sealing surface
Solution Approach 1:
The patent applies a preliminary correction action to the sealing surface after bulk goods treatment. The correction device with forming elements addresses notches and bumps on the sealing surface before the sealing screw is used, ensuring proper sealing function while maintaining the efficiency of bulk goods production
Solution Approach 2:
The patent changes the physical state and properties of the sealing surface by applying controlled forming forces through the correction device. This transforms the sealing surface geometry to eliminate defects caused by cold extrusion and bulk goods handling
2Ease of manufacture
If narrow manufacturing tolerances are exceeded in cold extruded sealing screws, then ease of manufacture is improved, but reliability deteriorates due to leakage issues
Solution Approach 1:
The correction device applies controlled forming forces to modify the sealing surface parameters, transforming defective surfaces into functional sealing surfaces. This allows the manufacturing process to operate with relaxed tolerances while maintaining final product reliability
Solution Approach 2:
The patent converts the harmful effects of exceeded tolerances (notches and bumps) into beneficial outcomes by using the correction device to reshape the sealing surface. The correction process transforms potential defects into acceptable sealing surfaces, turning manufacturing variations into non-critical issues
3Manufacturing precision
If a separate correction station is used to fix sealing surface deformations, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the correction function with existing handling equipment by integrating forming elements into the bulk goods treatment system. This merging approach eliminates the need for separate correction stations, reducing device complexity while maintaining sealing surface quality
Solution Approach 2:
The correction device is designed to perform multiple functions: it corrects sealing surface deformations, applies controlled forming forces, and can be integrated with bulk goods handling equipment. This multi-functionality reduces the need for dedicated separate stations, simplifying the overall system
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 device effectively reduces the percentage of leaky sealing screws by correcting deformations and ensuring reliable tightness, improving the sealing effect even without elastomer seals, and allows for on-site correction and testing without additional processing stations.
Implementation Method 1
Deformation of the sealing surface, in particular indentations due to bulk material treatment
Implementation Method 2
cold extruded part sealing screws
Implementation Method 3
leak testing means for testing the sealing effect of the screw by applying pressure with a pressure medium, a test chamber for applying pressure medium, in particular compressed air
Data Source
Figure 1
AI summary
The invention relates to a sealing surface correcting device for sealing screws (3), in particular sealing screws handled as bulk material, which are made of metal, in particular cold extruded part sealing screws, comprising shaping means, which are preferably hydraulically driven, for applying a shaping force to a sealing surface (2) of a sealing screw (3), preferably a sealing surface formed on the lower face (10) of a screw head peripheral collar, in order to correct deformations of the sealing surface (2), in particular indentations due to a bulk material handling process. The correcting device also comprises a seal testing means (18) for checking the sealing effect of the sealing screw (3) by applying pressure using a pressure medium, wherein a test chamber (16) for supplying a pressure medium to the sealing screw (3) is a part of the shaping means. The invention also relates to a method for correcting the sealing surfaces of sealing screws and testing the sealing effect in a combined manner.