Leather Splitting Template for Complex Contour Skiving

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Solution Overview

Problem

Existing skiving and splitting machines for leather workpieces can only process simple, flat sections effectively, and complex contours require manual operation, limiting efficiency and flexibility.

Innovation Solution

A method involving a splitting template with elevations that allows for mechanical skiving and splitting along complex contours by varying material removal based on elevation placement, enabling simultaneous thinning and contour reproduction in a single step.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If simple, flat sections are processed with skiving or splitting machines, then mechanical processing is efficient and automated, but complex outer contours can only be processed manually

Engineering Contradiction:
Improveautomation of skivingVSAvoidability to process complex contours
Core Design Contradiction:
Extent of automationVSAdaptability or versatility

Solution Approach 1:

The patent uses a template that copies the complex outer contour of the workpiece. This template is placed on the workpiece and guides the skiving knife, allowing the complex contour to be reproduced automatically without manual intervention. The template acts as a physical copy or model that transfers the desired contour shape to the processing path.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The template serves as an intermediary element between the automated skiving machine and the complex contour workpiece. It mediates the interaction by providing a physical guide that the knife follows, enabling the machine to process complex shapes it would otherwise be unable to handle automatically.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Productivity

If material is removed uniformly across the entire workpiece during splitting, then the workpiece is thinned evenly, but selective skiving along specific contours requires additional manual steps

Engineering Contradiction:
Improveprocessing speedVSAvoidselective material removal accuracy
Core Design Contradiction:
ProductivityVSManufacturing precision

Solution Approach 1:

The template has a specific geometric design with varying distances from its edges to the workpiece contour. Areas where the template edge is closer to the workpiece contour result in greater material removal, while areas where it is farther away result in less or no material removal. This creates locally differentiated skiving depths automatically during the splitting process.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent combines the skiving function and the contour guidance function into a single template element. The same template that guides the knife along the complex contour also determines the selective material removal pattern, merging two functions (guidance and selective skiving) into one component.

Inventive Principle:
Principle #5Merging (Combining)

3Manufacturing precision

If manual skiving is used for complex contours, then processing precision can be maintained, but productivity decreases and labor intensity increases

Engineering Contradiction:
Improveskiving accuracyVSAvoidprocessing efficiency
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The template copies the precise complex contour geometry and uses it to guide the automated knife, maintaining the precision that would otherwise require manual skill. The physical copy of the contour in the template ensures accurate reproduction without manual intervention.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The patent replaces the manual mechanical skill of an operator with an automated system guided by a physical template. The template-guided automated knife substitutes for the hand-held knife operated by a skilled worker, maintaining precision while eliminating manual labor.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS12545968B2Position splitting
Publication Date: 2026.02.10 LISA DRAXLMAIER GMBH
  • US12545968B2 patent drawing
  • US12545968B2 patent drawing

AI summary

A method for splitting a semi-finished product includes placement of the semi-finished product on a splitting template, and the splitting template includes at least one elevation. The method includes fixation of the semi-finished product on the splitting template, in which an area of the semi-finished product is arranged on the elevation. The method includes splitting of the semi-finished product, in which material is removed from the semi-finished product during splitting. The material removal in the area that is arranged on the elevation is greater than in an area that is not arranged on the elevation.