Indirect Extrusion Press Shell Removal Method
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Solution Overview
Problem
Existing indirect extrusion press methods face significant disassembly effort and operational unreliability due to shell remnants, which hinder subsequent pressing procedures and tool head introduction, leading to potential jamming and material block compression.
Innovation Solution
A method involving moving the block holder to bring the indirect punch out, placing a further tool head between the punch and material block, introducing the tool head into the block accommodation, and pushing it to press the shell out, ensuring reliable removal and minimizing remnants through guided movement and use of a manipulator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the tool head is pulled out of the block holder together with the shell, then the shell removal is simplified, but complete removal of the shell is not possible and remnants remain
Solution Approach 1:
The shell removal process is segmented into two distinct phases: first pulling the tool head with the shell out of the block holder, then introducing a second tool head to push the remaining shell remnants out. This segmentation allows each tool head to perform a specific function, achieving complete shell removal while maintaining process simplicity.
Solution Approach 2:
A second tool head is introduced as an intermediary element to facilitate complete shell removal. This intermediate tool head pushes the shell remnants that remain after the first tool head is pulled out, enabling complete removal without compromising the simplicity of the initial removal step.
2Productivity
If shell remnants remain in the block holder, then the disassembly effort is reduced, but subsequent pressing procedures are hindered and tool heads may jam
Solution Approach 1:
The shell removal action is performed as a preliminary step before introducing new material blocks and tool heads. By completely removing the shell in advance, the system prevents potential jamming and compression issues that would occur during subsequent pressing procedures, ensuring operational reliability without reducing productivity.
Solution Approach 2:
The shell, which initially appears as waste material to be removed, is converted into a useful element by using the second tool head to push it out. This transforms the potential harm of shell remnants into a beneficial complete removal process that enhances operational reliability.
3Reliability
If a second tool head is introduced to push the shell out, then complete shell removal is achieved, but the device complexity increases
Solution Approach 1:
The second tool head serves multiple functions: it pushes the shell remnants out of the block holder, and can also be used for introducing new material blocks. This multi-functionality reduces the need for additional specialized components, offsetting the complexity increase by consolidating functions into existing elements.
Data Source
AI summary
In a method for operating an indirect extrusion press, wherein the indirect extrusion press includes an indirect punch having a tool head that can be accommodated on the indirect punch, a closure piece, and a longitudinally movable block holder having a material block accommodation for accommodating a material block, after pressing a material block and forming a shell in a shell chamber, a tool head to be replaced is pushed out of the block holder by a tool head to be inserted, so that very operationally reliable removal of a shell formed during one or more pressing procedures is possible. For this purpose, an indirect extrusion press can have a maximal distance between a closure piece and an indirect punch that corresponds at least to the sum of the expanses of the tool head and of the block holder in the movement direction.