Brake Pad Heat Treatment Isolating Metallic Support From Infrared Heating
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Solution Overview
Problem
Modern brake pads with electronic systems are compromised by heat treatments, as existing methods cannot achieve the necessary surface temperature for friction material without overheating the metallic support, which disables the electronic systems.
Innovation Solution
A plant and method using a tunnel oven with infrared heaters and a system for feeding cooled air to isolate the metallic support from heat, allowing the friction material's surface to reach temperatures over 350°C while keeping the metallic support below 250°C, utilizing a conveyor device and air distribution system to control temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If IR irradiation heating is used to treat the surface of the block of friction material, then the surface temperature reaches greater than 350°C, but the metallic support temperature increases to 270-280°C which compromises electronic systems
Solution Approach 1:
The heating process is segmented into two distinct phases: first convective heating to uniformly heat the entire brake pad to around 200°C, then IR irradiation to specifically heat the friction material surface to greater than 350°C. This segmentation allows selective heating of different regions at different temperatures, protecting electronic systems while achieving required surface treatment temperature.
Solution Approach 2:
Before applying IR irradiation, the brake pad undergoes preliminary convective heating to raise the temperature of the metallic support and internal layers to around 200°C uniformly. This preliminary action ensures that when IR heating is applied, the temperature gradient is controlled and the metallic support does not experience excessive temperature rise that would damage electronic components.
2Stability of the object's composition
If conventional oven heating is used to heat the brake pad uniformly, then the metallic support reaches around 200°C, but the surface of the friction material does not reach the required treatment temperature of greater than 350°C
Solution Approach 1:
The invention merges two different heating methods: convective heating from a conventional oven and IR irradiation heating. The convective phase provides uniform heating throughout the brake pad, while the IR phase concentrates energy on the friction material surface. By combining these methods in sequence, both uniform temperature distribution and high surface temperature are achieved.
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
Effectively maintains the metallic support at a safe temperature for electronic systems while achieving the required surface temperature for friction material, ensuring optimal operation and physical characteristics.
Implementation Method 1
an IR irradiation heating oven for treating the surface
Implementation Method 2
the surface of the block of friction material opposite the metallic support is lapped by a current of air
Data Source
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Figure 2
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AI summary
Plant and associated method for the heat treatment of brake pads (2) wherein a surface (18) of a block of friction material (13) opposite a metallic support (12) of the brake pad (2) is heated by means of infrared irradiation within a tunnel oven (3); wherein a device feeding cold air (20) within the oven (3) aspirates environmental air, cools the environmental air aspirated by means of a refrigerating unit (28) and feeds a flow (F) of cooled environmental air against the metallic support (12) during the infrared irradiation heating step, simultaneously aspirating the cooled environmental air before the latter can lap over the block (13) of friction material, in such a way as to locally cool the metallic support (12) only.