Turret Lathe Tool Unit Layout for Spindle Interference Avoidance
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Solution Overview
Problem
In lathes with multiple turret surfaces, there is a risk of interference between tool units attached to adjacent surfaces and the spindle, which can be avoided by positioning the tool edge away from the chuck, but this reduces heavy-cut performance or requires removing tool units, limiting the number of tools and machining capabilities.
Innovation Solution
A lathe design where the second tool unit is shaped to avoid the area occupied by the spindle relative to the first tool unit, allowing the machining point to be brought close to the chuck for heavy-cut performance without interfering with the spindle, and can be oriented for both front and back machining uses, reducing the number of tool types needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the tool edge is positioned apart from the chuck in the Z-axis direction to avoid interference with the spindle, then interference risk is reduced, but heavy-cut performance deteriorates
Solution Approach 1:
The invention transitions from positioning tools only in the radial direction to utilizing the axial dimension by arranging tool units in the tool unit attaching direction (perpendicular to spindle axis). This dimensional change allows tools to be positioned closer to the chuck without causing interference, as the adjacent tool units are offset axially rather than radially.
Solution Approach 2:
The invention employs a rotatable turret head that can dynamically position multiple tool units around the spindle axis. By rotating the turret head, different tool units can be brought into the machining position while others are positioned away from interference zones, enabling flexible adaptation between avoiding interference and achieving heavy-cut performance.
2Object-affected harmful factors
If tool units are removed from adjacent turret surfaces to avoid interference, then interference risk is reduced, but the number of tool units is reduced
Solution Approach 1:
The invention utilizes the axial dimension (tool unit attaching direction perpendicular to spindle axis) to arrange multiple tool units along the turret head circumference. This allows maintaining a high number of tool units while avoiding interference through axial offset rather than radial removal.
Solution Approach 2:
The turret head serves multiple functions by accommodating numerous tool units on different turret surfaces. Each turret surface can hold tool units that serve different machining purposes, and the rotatable structure allows any of these tools to be positioned for machining as needed, providing universal machining capability.
3Productivity
If the tool edge is brought near the chuck without interference by removing tool units from adjacent surfaces, then heavy-cut performance is improved, but device complexity increases due to fewer tools requiring more specialized configurations
Solution Approach 1:
The invention arranges tool units in the axial dimension along the tool unit attaching direction, allowing multiple tools to be positioned near the chuck without interference. This dimensional arrangement enables heavy-cut performance while maintaining diverse tool configurations without requiring complex specialized setups.
Data Source
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AI summary
A technology capable of improving machining performance of a lathe is provided. A first attaching position P1 and a second attaching position P2 are adjacent to each other in a tool unit attaching direction D4 perpendicular to a spindle axis direction D1. A second tool unit U2 attached to the second attaching position P2 is of a shape avoiding an area A0 that a spindle 30 possibly occupies relatively with respect to a first tool unit U01 working on the workpiece W1. When a rotary tool unit is attached to one of the first attaching position P1 and the second attaching position P2, a machining point P10 of the second tool unit U02 working on the workpiece W1 is deviated to the side of the spindle 30 in the spindle axis direction D1 from the rotational center CE1 of the rotary tool unit across the turret surface 41.