Aluminum Alloy Casting Hole Cutting With Annular Drills
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Solution Overview
Problem
The production of aluminum alloy castings for automobile chassis, such as caliper brackets and steering knuckles, faces challenges in material utilization and cost due to the need for cutting large center holes, which results in significant scrap material and increased processing time.
Innovation Solution
A cutting method using multiple annular drills to drill and separate scraps, followed by a trimming die with scrap ejecting blocks and a hydraulic press to efficiently remove the scraps, improving material utilization and reducing processing time and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If direct cutting is used to form large center holes, then the casting quality is ensured, but the material utilization rate decreases and production cost increases
Solution Approach 1:
The patent divides the single large center hole into multiple smaller holes arranged in an array. By drilling multiple small holes instead of one large hole, the cutting width is reduced, allowing the use of narrower cutting blades that produce less scrap material while still achieving the required casting quality and structural integrity.
Solution Approach 2:
The patent transforms the problem from a two-dimensional large hole cutting operation into a three-dimensional array of multiple small holes. This dimensional transformation allows the cutting process to be optimized by reducing the width of individual cuts while distributing the total hole area across multiple positions, thereby minimizing material loss.
2Manufacturing precision
If direct cutting is used to form large center holes, then the casting quality is ensured, but the processing time increases and production cost increases
Solution Approach 1:
The patent segments the large center hole into multiple smaller holes that can be drilled simultaneously or in rapid succession using multi-point drill bits. This segmentation reduces the total cutting path length and allows for faster material removal compared to cutting a single large hole, thereby reducing processing time while maintaining casting quality.
Solution Approach 2:
The patent combines multiple drilling operations into a single machining pass by using drill bits with multiple cutting points arranged in an array. This merging of operations eliminates the need for multiple separate drilling passes, significantly reducing processing time while ensuring consistent casting quality across all holes.
3Loss of substance
If multiple annular drills are used to drill holes, then the material utilization rate is improved, but the device complexity increases
Solution Approach 1:
The patent employs multi-point annular drill bits that can drill multiple holes in a single operation, making the drilling device universal for creating arrays of holes with different patterns and spacing. This multi-functionality allows the same drilling apparatus to handle various hole configurations without requiring tool changes or complex repositioning, thereby reducing device complexity despite the increased material utilization efficiency.
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 method enhances material utilization, shortens processing time, and decreases production costs by maintaining scrap integrity and efficiently ejecting materials, thereby improving the overall efficiency of the casting process.
Implementation Method 1
the die frame is installed to a hydraulic press
Implementation Method 2
multiple springs are arranged between the movable plate and the upper pushing plate; the elastic forces of the springs drive the movable plate to move downwards
Data Source
AI summary
The present disclosure discloses a cutting method for an aluminum alloy casting, and a trimming die. The cutting method for the aluminum alloy casting includes the following steps of: drilling a part to be cut off of the aluminum alloy casting by multiple annular drills, and withdrawing the annular drills when the annular drills drill to a preset position; and separating multiple scraps to be separated from the aluminum alloy casting by the trimming die.