Direct Drive Ejector for Precision Part Removal
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Solution Overview
Problem
Existing solutions for removing parts from high-speed presses often damage the surface finish of precision parts, fail to separate slugs and work pieces efficiently, and are not suitable for the lower opening heights of fine blanking tools, leading to increased finishing costs and reduced productivity.
Innovation Solution
A direct drive system with a pivoting cross slide and rapid-action coupling, utilizing a dynamic liquid-cooled torque motor to move parts and slugs at high speeds, featuring a parts plate with recesses for precise part handling and a separate chute system for efficient removal, ensuring high accuracy and surface finish while accommodating the lower tool opening heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed ejector elements are used to remove parts quickly, then productivity increases, but the surface finish of precision parts is damaged
Solution Approach 1:
The patent replaces traditional mechanical ejector systems with a suction-based removal system. A suction device creates a vacuum field that gently draws parts out of the tool without mechanical contact, eliminating surface damage while maintaining high removal speeds through controlled airflow fields.
Solution Approach 2:
The invention uses pneumatic principles through a suction device that generates negative pressure to remove parts. The pneumatic field enables contactless part ejection, preserving surface finish while achieving rapid removal rates suitable for high-speed pressing operations.
2Productivity
If traditional ejector devices are used, then parts can be removed from the tool, but slugs and work pieces cannot be separated efficiently
Solution Approach 1:
The suction device is divided into multiple independent suction nozzles or zones that can be individually controlled. This segmentation allows selective suction of different objects (parts versus slugs) based on their position, size, or suction response, enabling efficient separation without mechanical contact.
Solution Approach 2:
The system varies suction parameters such as pressure differential, airflow rate, or nozzle activation patterns to differentiate between parts and slugs. By dynamically adjusting these parameters, the device can selectively remove parts while leaving slugs behind or directing them to separate collection areas.
3Adaptability or versatility
If conventional removal systems are used, then parts can be ejected, but the system is not suitable for lower opening heights of fine blanking tools
Solution Approach 1:
The suction device introduces a new dimension of operation by using airflow fields rather than mechanical movement in the traditional ejection direction. This allows part removal through a different spatial mechanism that can accommodate restricted opening heights, as the suction force acts through a volume rather than requiring linear mechanical access.
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
Enables the simultaneous high-speed removal of precision parts and slugs with maintained surface finish and accuracy, reducing finishing costs and improving productivity by utilizing a direct drive system with a pivoting cross slide and separate chute system.
Implementation Method 1
a pivoting cross slide via an arm, a bracket and a rapid-action coupling for converting the rotating motion into a linear motion
Implementation Method 2
a direct drive comprising a drive shaft changing the turning direction in dependence of the stroke of the ram, which is pivoting connected to the cross slide via an arm, a bracket and a rapid-action coupling
Data Source
AI summary
Parts with high surface finish are removed from tools of a fine blanking press with accuracy and at high speed. The press has high opening and shutting speeds achieved by a direct drive having high acceleration power, a high turning moment, and small construction dimensions. A cross slide is movable transverse to a working direction of tool parts and is fixed at a frame of the direct drive. The direct drive includes a drive shaft which changes turning direction based on the stroke of a ram that is pivotally connected to the cross slide via an arm, a bracket, and a rapid-action coupling. Rotating motion is converted into a linear motion, which reverses between a rear stop position and a front stop position of the cross slide in a working area.