Resistance Welding Electrode Sealing Structure for Airtight Guide Pin Motion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric resistance welding electrodes fail to maintain reliable airtightness due to inadequate consideration of the close-contact area size and misalignment of the guide pin, leading to shortened service life and potential air leakage.
Innovation Solution
The width dimension of the movable end surface is set to be less than half of the thickness dimension of the large-diameter portion, increasing surface pressure and embedding any minute metal pieces into the base material, while the medium-diameter portion is designed for two-point support to minimize tilt displacement and ensure airtightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the close-contact area of the movable end surface is reduced to increase surface pressure, then airtightness is improved and metal pieces are pushed into the base material, but the sealing area is reduced
Solution Approach 1:
The patent applies parameter changes by optimizing the width dimension of the movable end surface to be less than half of the thickness dimension of the large-diameter portion. This dimensional parameter adjustment increases surface pressure to push metal pieces into the base material while maintaining sufficient sealing area, resolving the contradiction between airtightness and sealing area.
2Ease of operation
If the guide pin is allowed to slide freely, then the sliding part can move smoothly, but misalignment and tilting of the guide pin occur
Solution Approach 1:
The patent applies beforehand cushioning by designing the medium-diameter portion with sufficient thickness to receive and cushion external forces acting on the guide pin before they can cause significant misalignment or tilting. This pre-cushioning effect maintains both sliding smoothness and alignment precision.
3Area of stationary object
If the width dimension of the movable end surface is increased to provide larger sealing area, then sealing coverage is improved, but surface pressure decreases and metal pieces cannot be pushed into the base material
Solution Approach 1:
The patent resolves this contradiction by establishing a specific parameter relationship where the width dimension of the movable end surface is less than half of the thickness dimension of the large-diameter portion. This parameter optimization ensures sufficient surface pressure to push metal pieces into the base material while maintaining adequate sealing area.
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 configuration ensures complete airtightness, prevents air leakage, and maintains a reliable sealing action, even under external forces, thereby improving the working environment and extending the electrode's service life.
Implementation Method 1
the area of the movable end surface is reduced to increase a pressurizing force of the movable end surface against a stationary inner end surface
Implementation Method 2
an end surface of a sliding part made of a synthetic resin material is brought into close contact with or separated from an inner end surface formed on an electrode main body, thereby ventilating and blocking cooling air
Data Source
Figure 1A~1C
Figure 2A~2B
Figure 3A~3D
AI summary
A guide hole 6 is constituted of a large-diameter hole 7, a medium-diameter hole 8, and a small-diameter hole 9. A sliding part 13 fitted in the guide hole 6 is formed of a synthetic resin material, a large-diameter portion 24 of the sliding part 13 is fitted in the large-diameter hole 7 in a slidable state, and a medium-diameter portion 25 is fitted in the medium-diameter hole 8 in a slidable state. A movable end surface 33 of the sliding part 13 is configured to be in close contact with a stationary inner end surface 32 of the guide hole 6. By configuring a width dimension W1 of the movable end surface to be less than half of a thickness dimension W3 of the large-diameter portion 24, a pressurizing force of the movable end surface 33 is increased and a minute metal piece 34 is pushed from the movable end surface 33 into a base material of the sliding part 13, and a thickness dimension of the medium-diameter portion 25 is set large.