Structured Rolling Jaw Surface to Prevent Slip and Wear
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Solution Overview
Problem
Conventional rolling jaws with transverse grooves experience rapid wear due to high contact pressure and 'curb chain structure' formation, reducing their service life and screw shaft strength.
Innovation Solution
The rolling jaw surface is structured with a leather-like surface, created through laser radiation or machining, to distribute load evenly and prevent slipping, maintaining screw shaft strength and extending rolling jaw life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transverse grooves are created on the rolling die surface to prevent screw slipping, then the anti-slip capability is improved, but the rolling die surface is subjected to significant stress causing rapid wear and reduced service life
Solution Approach 1:
The patent applies local quality by creating a differentiated surface structure on the rolling die. The rolling die surface has two distinct zones: grooves with structured surfaces (elevations and depressions) for high friction and anti-slip capability, and smooth rolling surfaces between grooves for low wear. This local differentiation allows each area to perform its specific function optimally without compromising the other.
Solution Approach 2:
The rolling die surface is segmented into multiple functional zones: grooves containing structured surfaces for gripping the workpiece, and smooth rolling surfaces for material flow. This segmentation separates the anti-slip function from the rolling function, allowing each to be optimized independently and reducing overall wear on the rolling surfaces.
2Reliability
If transverse grooves are created on the rolling die surface, then the anti-slip capability is improved, but the grooves create a tank track structure that reduces the cross-section and strength of the screw shaft
Solution Approach 1:
The structured surface is applied locally only within the groove areas where it is needed for anti-slip capability. The rolling surfaces between grooves remain smooth and do not impart impressions to the workpiece. This localized application ensures that the structured surface provides gripping force without creating harmful tank track structures on the screw shaft.
Solution Approach 2:
Instead of creating a continuous structured surface across the entire rolling die (which would strengthen grip but weaken the screw), the patent inverts the approach by applying the structured surface only in the groove areas. This inversion allows the structured surface to provide anti-slip capability where needed while preserving screw shaft strength in the rolling areas.
3Duration of action of stationary object
If the rolling die surface is structured with elevations and depressions to increase surface hardness and reduce wear, then the wear resistance is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent replaces complex mechanical methods of creating structured surfaces with laser technology. The laser beam can directly create the required elevations and depressions on the rolling die surface through controlled melting and evaporation, eliminating the need for complex mechanical machining processes and tooling.
Solution Approach 2:
The patent uses laser parameters (power, pulse duration, scanning speed) to control the formation of the structured surface. By adjusting these parameters, the desired surface morphology with elevations and depressions is achieved efficiently. The laser process allows precise control over the surface structure without requiring complex mechanical intervention.
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 structured surface reduces wear on rolling jaws, maintains screw shaft strength, and improves the quality of threaded workpieces by preventing slipping and ensuring clean thread formation.
Implementation Method 1
the rolling die surface is structured by laser radiation
Implementation Method 2
alloy components can be evaporated by the laser radiation
Implementation Method 3
prevents, for example, the workpiece, especially the screw blank, from slipping
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The invention relates to a method for machining a rolling die, in particular a rolling die for rolling a thread into a screw blank, having a rolling die surface with a plurality of grooves, wherein the rolling die surface is structured.