Pivoting Machining Head for Flexible Window Frame Corner Processing
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Solution Overview
Problem
Existing machining devices for window and door frames face challenges such as high design and programming complexity, limited tool versatility, and inefficient processing due to the arrangement of movable and rotatable tools on robot arms, leading to increased effort and reduced flexibility.
Innovation Solution
A device with a machining head that can pivot and have a positioning shaft with tools arranged at an angle, allowing simultaneous machining of frame corners and legs using a single clamping position, combined with CNC-controlled movement in three axes and dual motor drives for tool operation, enabling precise and adaptable tool selection and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If tools are arranged on a robot arm with movable and rotatable positioning, then the device can machine various frame geometries, but the design complexity and programming effort increase significantly
Solution Approach 1:
The device segments the machining functions into a stationary machining head with fixed tools and a separate frame positioning system. The frame is clamped in different positions to access different machining areas, rather than moving the tools. This segmentation eliminates the complexity of movable tool carriers while maintaining versatility through frame repositioning.
Solution Approach 2:
Instead of moving the tools to reach different machining positions (conventional approach), the invention inverts the approach by keeping tools stationary and moving the workpiece (frame) to the tools. The frame is clamped in various positions on the machine bed to present different surfaces for machining, thereby reducing device complexity while maintaining adaptability.
2Adaptability or versatility
If a second movable tool carrier is added to process both frame corners and profile legs, then machining versatility improves, but device complexity and effort increase
Solution Approach 1:
The stationary machining head is designed with multiple fixed tools that can machine both frame corners and profile legs. By positioning the frame differently on the machine bed, the same machining head performs multiple machining functions, eliminating the need for a second movable tool carrier while maintaining universal machining capability.
Solution Approach 2:
The invention uses a single stationary machining head that machines both corners and profile legs by repositioning the frame rather than adding a second movable tool carrier. The frame is clamped in different positions to present different surfaces to the stationary tools, thereby achieving multi-functionality without increased device complexity.
3Ease of operation
If tools are arranged on a robot arm with three spatial directions movement, then positioning flexibility improves, but the number of tools and programming effort increase
Solution Approach 1:
The invention inverts the conventional robot arm approach by keeping the machining head stationary and using the frame's repositioning capability to achieve positioning flexibility. The frame can be clamped in various positions on the machine bed, providing the needed flexibility without requiring a complex robot arm with three spatial directions movement, thereby reducing the number of tools and programming effort.
Data Source
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AI summary
The invention relates to a device for machining frames welded from profile pieces (1, 2, 3, 4), such as window or door frames (5) made of plastic, said device comprising at least one machining head (14, 25) and machining tools (6, 7, 8, 9; 10, 11, 12, 13) which are mounted thereon and can be delivered to the relevant machining position on the frame (5). The machining head (14) can be pivoted about an axis (15) and has a positioning shaft (16) which is mounted at an angle with respect to the pivot axis (15) and on which the machining tools (7 - 13) are mounted. The positioning shaft (16) extends on both sides of the machining head (14, 25) with machining tools (7 - 13) at both end regions (16a, 16b) of the positioning shaft (16).