Automatic Lathe Axis Control for Tool Post and Spindle Alignment
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Solution Overview
Problem
In machine tools like automatic lathes, the superposition control of spindle headstocks fails to maintain the positional relationship between the tool post and spindle headstock when the tool post moves in a direction inclined relative to the X axis, leading to improper movement regulation.
Innovation Solution
A machine tool design incorporating a spindle headstock and a tool post with movement axes in both the X axis and an inclined direction, along with a controller that performs superposition control, allowing the tool post to move orthogonally in the Y axis by combining movements along these axes, and regulates the spindle headstock's movement to maintain accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If superposition control is used to move the tool post in the Y axis direction by combining movement along the X axis and inclined Ys axis, then the tool post can achieve complex motion paths, but the positional relationship between the tool post and spindle headstock cannot be maintained appropriately
Solution Approach 1:
The patent extracts and separates the regulation function from the superposition control system. A dedicated regulator is introduced to specifically manage the spindle headstock movement in the X axis direction, independent from the tool post's combined axis movement. This separation allows the regulator to precisely control spindle headstock position without being affected by the complexity of combining X axis and Ys axis movements, thereby maintaining accurate positional relationships while preserving versatile motion path capability.
2Ease of operation
If the tool post moves in the Y axis direction by combining X axis and Ys axis movements, then the tool post achieves flexible positioning, but the spindle headstock moves in the X axis direction under superposition control causing improper movement regulation
Solution Approach 1:
The regulator acts as an intermediary between the superposition control system and the spindle headstock. It receives control signals for spindle headstock movement and independently regulates the X axis direction movement, mediating between the complex combined axis movements of the tool post and the spindle headstock's actual position. This intermediary function ensures reliable movement regulation while maintaining the flexibility of tool post positioning through combined axis operations.
Data Source
AI summary
A machine tool includes a spindle headstock having a main spindle, a spindle headstock having a main spindle with a Z3 axis parallel to an axis center direction of the main spindle, a turret that moves relative to the spindle headstocks, and a controller that superposition-controls the spindle headstock with movement of the turret as a standard, wherein the turret is movable in directions of an X axis and a Ys axis that are orthogonal to a Z axis and intersect with the Z axis at an angle except for the right angle, and the controller moves the turret in a direction of a Y axis different from the Ys axis and the X axis by combining movement in the direction of the Ys axis and movement in the direction of the Y axis, and regulates, in the superposition control, the movement of the spindle headstock in the X axis direction associated with the movement in the Y axis direction.