Bore-Machining Attachment With Pivoting Spindle Head
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Solution Overview
Problem
Conventional machine tools face limitations in performing deep internal turning processes due to interference between the spindle head and the workpiece, leading to reduced rigidity and inability to machine narrower inner portions effectively.
Innovation Solution
A machine tool with an internal turning attachment that includes a detachable tool holder with adjustable tool mount angles, allowing the spindle head to pivot and change its angle to avoid interference, enabling deeper hole boring without sacrificing rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the attachment length is increased to reach deeper portions, then the machinable depth is improved, but the rigidity against cutting resistance deteriorates
Solution Approach 1:
The invention introduces a new degree of freedom by allowing the spindle head to pivot about a B-axis in addition to the conventional Z-axis movement. This dimensional change enables the tool to reach deeper portions of workpieces by adjusting the pivot angle, rather than simply extending the attachment length, thereby maintaining rigidity while achieving greater machinable depth.
Solution Approach 2:
The invention makes the spindle head dynamically pivotable about the B-axis during the turning process. This dynamic adjustment capability allows the system to adapt the tool orientation to reach different depths and angles, eliminating the need for fixed long attachments that would compromise rigidity.
2Adaptability or versatility
If the cross-sectional dimension of the ram shaft is reduced to machine narrower inner portions, then the adaptability to narrow workpieces is improved, but the rigidity is sacrificed
Solution Approach 1:
By adding the B-axis pivot capability, the invention enables narrow attachments to reach deeper and more varied portions of workpieces through angular adjustment. This dimensional freedom allows a compact attachment to machine a wider range of inner portions without compromising structural rigidity.
3Object-affected harmful factors
If the spindle head size is reduced to minimize interference, then the interference with workpiece is decreased, but the structural rigidity deteriorates
Solution Approach 1:
The invention employs a dynamically pivotable spindle head that can adjust its orientation about the B-axis. This allows a compact spindle head design to avoid interference with workpieces by changing its angle during operation, while maintaining structural rigidity through the pivot mechanism rather than simply reducing size.
Data Source
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AI summary
Provided is a bore-machining attachment for a machine tool that has a B-axis. In the bore-machining attachment (200), which is mounted on a main spindle head (62) having a B-axis, a 10-degree tool holder (250b) is attached to the tip of a body (220) and a bore (F1) in a workpiece (K1) that is fixed on a rotating table (80) is machined by a lathe tool (270).