Wear Lining Attachment via Inverted Insertion and Segmented Fasteners

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Solution Overview

Problem

Existing wear lining elements for structures like rotary grinding drums face challenges in rapid, safe, and efficient attachment due to alignment issues and increased wear at attachment holes, requiring heavy lifting and compromising on material usage.

Innovation Solution

A wear lining element with a convex bottom and irregular upper surface, featuring attachment means that protrude from the convex bottom for insertion into attachment holes from the opposite side, allowing for secure fastening without holes on the wear surface, using a combination of a holder, guide, and mounting components with locking and fastening mechanisms for secure attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If wear lining elements are attached using attachment holes from the tensioning side, then the attachment process can be performed, but the alignment of attachment means with attachment holes becomes difficult and time-consuming

Engineering Contradiction:

Improveattachment processVSAvoidalignment time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The wear lining element is pre-positioned on the wear surface before attachment, allowing the attachment means to be aligned with attachment holes while the element is already in its final position. This eliminates the need for time-consuming alignment adjustments after lowering the element into place.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of inserting attachment means from the tensioning side through the supporting construction, the attachment means are inserted from the wear side through the wear lining element itself. This inversion allows the attachment process to begin with the element already positioned on the wear surface.

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If attachment holes are provided in the wear lining element, then attachment can be performed from the wear side, but wear increases at the zones with holes

Engineering Contradiction:

Improveattachment accessibilityVSAvoidwear at attachment zones

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The attachment holes are removed from the wear lining element and transferred to the supporting construction only. The wear lining element becomes a solid, continuous wear surface without holes, eliminating the wear concentration problem at hole zones while maintaining attachment capability through the supporting construction's holes.

Inventive Principle:

Principle #2Taking out (Extraction)

3Loss of substance

If wear lining elements are made with minimal metallic material, then material usage is reduced, but secure attachment becomes more difficult to achieve

Engineering Contradiction:

Improvemetallic material usageVSAvoidattachment security

Core Design Contradiction:

Loss of substanceVSReliability

Solution Approach 1:

The attachment system is segmented into distinct components: the wear lining element, the supporting construction with integrated attachment holes, and separate attachment means. This allows the metallic material to be concentrated in the supporting construction and attachment means rather than distributed throughout the wear lining element, reducing overall metallic usage while maintaining secure attachment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The supporting construction acts as an intermediary that provides the attachment holes and structural support, allowing the wear lining element to be attached securely without requiring extensive metallic material within the element itself. The attachment means serve as intermediaries that connect the wear lining element to the supporting construction.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP2178644B1Wear lining element and an arrangement for the attachment of such

Publication Date: 2020.11.25 METABO MINERALS SWEDEN

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AI summary

The invention concerns an arrangement for the joining and attachment of a wear lining element (1) onto a surface that is subject to wear, a supporting surface (5) of a supporting construction (2), comprising attachment means (9) that when anchored in the wear lining element are each one intended to be inserted into attachment holes (10) arranged in the supporting construction whereby the wear lining element is held fastened against the supporting surface by means of supplementary fastening means (16) that are associated with the attachment means positioned to interact with the tensioning surface (11) located on the opposite side of the supporting surface. For rapid and safe fixing, the attachment means (9) comprises a holder (13) fixed attached to the wear lining element (1), a guide (14) designed to guide the wear lining element into place against the supporting surface through interaction with a hole wall in the attachment holes (10) of the supporting construction, a mounting (15) designed to hold the wear lining element fastened against the supporting surface (5) through interaction with the tensioning surface (11) of the supporting construction and fixing and locking means (12) that allow the guide and the mounting to be held in place in a manner that allows exchange, supported by the holder. The invention concerns also a wear lining element intended to be mounted on the inner surface of a rotary grinding drum.