Lathe Taper Turning With Manual X Feed and Z-Axis Tracking
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Solution Overview
Problem
Existing methods for producing inclined surfaces using lathes are either complex or lack precision, particularly when using simple lathes with limited capabilities, such as those that can only move the cross slide manually in the x-direction and have only one pull spindle.
Innovation Solution
A method and apparatus that utilize a main spindle driven by a first drive device, a pull spindle driven by a second independent drive device, a position measuring and display device, and a control device to enable semi-automatic production of inclined surfaces by manually moving the cross slide while automatically tracking the main carriage in the z-direction, ensuring precise movement of the cutting edge according to predetermined coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple lathe with manual cross slide movement is used, then device complexity is reduced, but manufacturing precision of inclined surfaces deteriorates
Solution Approach 1:
The patent implements feedback by continuously measuring the actual position of the cross slide using a position measuring device and comparing it with the desired position calculated from the data set. The control device uses this feedback information to calculate and adjust the main slide position, ensuring the cutting edge follows the predetermined inclined surface course even on simple lathes with manual cross slide movement.
Solution Approach 2:
The patent replaces complex mechanical coupling mechanisms (such as lead screws or gear connections between cross slide and main slide) with a control-based system. The control device calculates the required main slide movement based on measured cross slide position and the predetermined inclined surface geometry, substituting mechanical precision requirements with computational control.
2Manufacturing precision
If automatic tracking control is implemented, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The control device performs self-service by automatically calculating the required main slide position based on the measured cross slide position and the stored data set describing the inclined surface. The system serves itself by using its own measurement capabilities and computational functions to maintain precision without requiring external complex control mechanisms.
Solution Approach 2:
The control device serves multiple functions: it stores the data set describing the inclined surface, processes position measurements from the measuring device, calculates the required main slide position, and controls the main slide movement. This multi-functionality reduces the need for separate dedicated components for each function.
3Ease of operation
If manual cross slide movement is used, then ease of operation is improved, but productivity deteriorates
Solution Approach 1:
The patent ensures continuous useful action by simultaneously moving the cross slide manually while the control device continuously calculates and adjusts the main slide position. This allows the cutting process to proceed continuously along the inclined surface without interruption or need for separate positioning operations, maintaining both operator control and production efficiency.
Data Source
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AI summary
The invention relates to a method for producing an inclined surface using a lathe, comprising: a main spindle (H) driven by a first drive unit (A1) for rotating the workpiece (1), a feed screw (ZS) driven by a second drive unit (A2), a main slide (2) movable on a machine bed in a z-direction by means of the feed screw (ZS), a cross slide (3) manually movable on the main slide (2) in an x-direction perpendicular to the z-direction, a position measuring (P) and display device for measuring an xz-coordinate of a cutting edge of a tool (5) mounted on the cross slide (3) and for displaying the xz-coordinate on a screen, and a control device (S) for controlling the second drive unit (A2), wherein the method comprises the following steps: transferring a data set describing the path of the inclined surface to the control device (S),Moving the cutting edge to a position with predetermined starting coordinates using the main (2) and/or cross slide (3), rotating the workpiece (1) using the main spindle (H), and manually moving the cross slide (3) in an x-direction defined by the slope of the inclined surface, and simultaneously automatically tracking the main slide (2) in the z-direction using the second drive unit (A2) controlled by the control unit (S) such that the cutting edge of the tool (5) is moved according to the slope of the inclined surface to be produced.