Electro-Spindle Aggregate for Drilling and Rotary Broaching
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Solution Overview
Problem
Existing broaching techniques, particularly rotary broaching, struggle to fully integrate and optimize their capabilities on modern multi-axis machine tools, limiting the creation of complex and precise geometries.
Innovation Solution
The development of an electro-spindle aggregate with a rotary broaching unit, which includes a transmission shaft and a protection spring, integrated with a drilling unit and a containment casing, allowing for flexible movement and precise machining on 3-5 axis machine tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional broaching tools are used on multi-axis machine tools, then the machine's flexibility and precision are not fully utilized, but the capability to create complex geometries is limited
Solution Approach 1:
The broaching tool is designed to rotate during the broaching operation, transforming a static cutting tool into a dynamic one. This rotation enables the tool to effectively engage with multi-axis machine tool movements, allowing the system to fully utilize its flexibility and precision capabilities while creating complex geometries with high accuracy
Solution Approach 2:
The broaching tool is designed to function effectively on multi-axis machine tools, which are typically used for complex 3D machining operations. By adapting the broaching tool to rotate and work in conjunction with multi-axis movements, it gains universality and can be integrated into modern CNC machining centers, thereby improving adaptability without compromising precision
2Ease of manufacture
If a rotating element is used to make holes, then the process is simple, but complex geometries such as hexagonal holes cannot be created
Solution Approach 1:
The invention merges two previously separate operations into a single integrated process: hole drilling and geometry broaching. The broaching tool is designed to first drill a pilot hole and then perform the broaching operation in sequence, combining what were traditionally two distinct manufacturing steps into one continuous operation, thereby maintaining process simplicity while achieving complex geometries
Solution Approach 2:
The broaching tool is segmented into multiple cutting edges arranged along its length, each progressively removing material to create the final geometry. This segmentation allows the tool to transform a simple circular hole into a complex geometry through sequential material removal, maintaining ease of manufacture while achieving geometric complexity
Data Source
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AI summary
The present invention concerns a working aggregate (1), for machining a workpiece (P), such as panels and the like, made of aluminum, bronze, plastic, wood and the like, comprising: a power take-off (2) for force coupling to an electro-spindle; a drilling unit (3), having a drill bit (31), wherein said drilling unit (3) is operatively coupled to said power take-off (2) to receive driving force for making a hole (F) on said workpiece (P) by means of said drill bit (31); and a rotary broaching unit (4), having a broaching tool (41), wherein said rotary broaching unit (4) is operatively coupled to said power take-off (2) to receive driving force for carrying out rotary broaching processing on the hole (F) made on said workpiece (P) by means of said drill bit (31). The present invention also concerns a working center (100) and a method of machining a piece (P).