Staggered-teeth diamond saw blade with pre-plating layer
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Solution Overview
Problem
High-frequency induction and laser brazing processes for diamond saw blades often result in voids or stomas at the welding seam, leading to inadequate brazing strength, particularly for staggered-teeth diamond saw blades used in concrete pavement maintenance and engineering applications.
Innovation Solution
A staggered-teeth diamond saw blade design featuring a circular steel base with alternately arranged first and second diamond cutter heads laser-brazed onto the side wall, and diamond teeth protection cutter heads induction-brazed onto the external surface, with a pre-plating layer of copper or copper alloy formed through vacuum coating to enhance welding quality and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high-frequency induction brazing or laser brazing is used to attach diamond cutter heads to the steel base, then brazing efficiency and bonding strength are improved, but voids or stomas easily occur at the welding seam, causing brazing strength to be insufficient
Solution Approach 1:
A pre-plating layer of copper or copper alloy is deposited on the steel base surface before brazing the diamond cutter heads. This preliminary plating action creates a protective intermediate layer that prevents direct contact between the high-power brazing heat source and the steel base, thereby avoiding the formation of voids and stomas while ensuring strong bonding
2Productivity
If staggered-teeth diamond saw blade design is adopted to improve cutting performance, then cutting efficiency is enhanced, but the requirement for brazing strength increases, making it more difficult to avoid welding defects
Solution Approach 1:
The pre-plating layer is applied in advance to the steel base surface before the staggered diamond cutter heads are brazed. This preliminary copper plating creates a protective barrier that enables strong brazing bonds even under the higher stress conditions imposed by the staggered-teeth design, allowing the blade to achieve both high cutting efficiency and sufficient brazing strength
3Strength
If high-power laser brazing or induction brazing is used to achieve high brazing strength, then bonding quality is improved, but the high power input causes voids or stomas at the welding seam
Solution Approach 1:
A copper or copper alloy pre-plating layer is introduced as an intermediary between the steel base and the diamond cutter heads. This intermediate layer has appropriate thermal and electrical conductivity that allows high-power brazing to proceed effectively while preventing the formation of voids and stomas, thus maintaining both high bonding strength and welding seam integrity
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 solution improves cutting efficiency and reduces power consumption by ensuring higher shear-resistant strength and brazing quality, meeting the demands of high-speed cutting in construction applications like concrete pavement expansion joints and wall troughs.
Implementation Method 1
a pre-plating layer is preformed at a welding surface where the side wall is welded with the first diamond cutter heads and the second diamond cutter heads; a pre-plating layer is preformed at a welding surface where the external surface of the steel base is welded with the diamond teeth protection cutter heads
Implementation Method 2
multiple first diamond cutter heads and multiple second diamond cutter heads are alternately arranged at the side wall through laser brazing
Implementation Method 3
multiple diamond teeth protection cutter heads are uniformly distributed on an external surface of the steel base through high frequency induction brazing
Data Source
AI summary
A staggered-teeth diamond saw blade includes a circular steel base and a side wall provided at an outer edge of the steel base. Multiple first diamond cutter heads and multiple second diamond cutter heads are alternately arranged at the side wall through laser brazing; multiple diamond teeth protection cutter heads are uniformly distributed on an external surface of the steel base through high frequency induction brazing; a pre-plating layer is preformed at a welding surface where the side wall is welded with the first diamond cutter heads and the second diamond cutter heads; a pre-plating layer is preformed at a welding surface where the external surface of the steel base is welded with the diamond teeth protection cutter heads. The diamond cutter heads of the present invention are staggered to thicken the thickness thereof while cutting concrete pavement and other materials at high speed.