Wire Saw Groove Pitch Profile for Uniform Slice Thickness
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Solution Overview
Problem
Existing wire sawing methods produce slices with widely distributed thicknesses, which complicates subsequent machining processes like lapping, grinding, and polishing, as they require uniform slice thickness to maintain even material removal and prevent overloading or misalignment.
Innovation Solution
A method for simultaneously slicing multiple slices from a workpiece using a wire saw, where the pitch between adjacent grooves on the wire guide rollers follows a non-linear pitch function dTAR(WP), which is determined based on target thickness characteristic values, previous slicing operation pitches, and thickness characteristics, ensuring uniform slice thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a linear pitch function is used for wire guide rollers, then the slicing operation is simple to perform, but the slice thickness distribution becomes wide and non-uniform
Solution Approach 1:
The patent applies local quality by implementing a non-linear pitch function that varies the groove spacing differently at different positions along the wire guide roller. Specifically, the pitch between adjacent grooves is smaller at positions corresponding to the beginning and end of the workpiece and larger at intermediate positions, compensating for edge effects and achieving uniform slice thickness across the entire workpiece length.
Solution Approach 2:
The patent changes the geometric parameter of the pitch function from linear to non-linear. The pitch function is defined as a continuous function that modifies the groove spacing based on position, transforming the uniform linear spacing into a variable spacing pattern that optimizes slice thickness uniformity while maintaining manufacturability.
2Ease of manufacture
If wire lap slicing is used with loose abrasive, then the wire and abrasive can be replaced independently, but the slice thickness control becomes less precise
Solution Approach 1:
The patent substitutes the mechanical bonding mechanism with a chemical bonding mechanism by using electroplated or bonded abrasives that are firmly attached to the wire surface. This replacement allows for precise control of the abrasive-wire interaction while maintaining the ability to replace components independently through standardized wire and abrasive element designs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method achieves a narrow distribution of slice thicknesses, meeting the requirements for uniformity and plane-parallelism of the front and rear sides of the slices, thereby facilitating efficient and economical subsequent machining processes.
Implementation Method 1
Relative movement in the presence of an abrasive brings about a removal of material from the workpiece upon contact of the workpiece and the wire web
Implementation Method 2
Rotation of the wire guide rollers produces a relative movement between the wire sections and the workpiece
Data Source
AI summary
A multiplicity of slices are simultaneously sliced from a workpiece during a slicing operation using a wire saw. A non-linear pitch function dTAR(WP) is selected dependent on a target thickness value function TTAR(WP), a pitch function dINI(WP) and a thickness value function TINI(WP), dTAR(WP) and adjacent grooves in the wire guide rollers are assigned a pitch at a position WP during the slicing operation, TINI(WP) slices which are obtained during a plurality of preceding slicing operations by means of the wire saw at the position WP are assigned a thickness value, dINI(WP), adjacent grooves in the wire guide rollers at the position WP are assigned a pitch during the preceding slicing operations, TTAR(WP) slices which are sliced off during the slicing operation at the position WP are assigned a target thickness value, WP denoting the axial position of the adjacent grooves with respect to the axes of the wire guide rollers.