Fracture Face Cleaning Using Vibration-Driven Free Impact
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Solution Overview
Problem
Existing cleaning devices for fracture surfaces of workpieces separated by fracture separation often damage the interfaces, leading to reduced accuracy of fit and ineffective removal of contaminants, which complicates further processing such as screwing of workpiece parts together.
Innovation Solution
A cleaning device with a workpiece holder featuring a support part and a hold-down element allowing vertical movement, combined with a vibration device that accelerates the workpiece to collide with the hold-down element, ensuring optimal detachment of impurities from fracture interfaces without damping or braking, and allowing for precise cleaning of multiple fracture interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If workpiece parts are moved against one another with little force to remove particles, then contaminants are removed from fracture surfaces, but the fracture interfaces are damaged and accuracy of fit is reduced
Solution Approach 1:
The invention uses a vibration device to generate vibrations in the workpiece at its natural frequency, causing the workpiece to collide with the hold-down element during cleaning. This vibrational approach removes contaminants effectively without requiring direct forceful contact between workpiece parts, thereby preventing damage to the fracture interface and maintaining accuracy of fit.
Solution Approach 2:
The cleaning process employs periodic acceleration of the workpiece through pulsed vibrations, creating repeated collision cycles with the hold-down element. This periodic action allows contaminants to be removed gradually over multiple cycles without applying excessive continuous force that could damage the fracture surface.
2Object-generated harmful factors
If workpiece is accelerated to collide with hold-down element, then contaminants detach effectively, but driver may brake workpiece and cause movement damping
Solution Approach 1:
The driver is designed with dynamic timing control where the upper movement reversal point is arranged before the workpiece impacts the hold-down element. This ensures the driver begins its downward movement before the workpiece hits, avoiding any braking effect and allowing the workpiece to maintain its collision speed for optimal contaminant detachment.
Solution Approach 2:
The driver performs preliminary acceleration of the workpiece toward the hold-down element, and the timing is arranged so the driver reverses direction before impact occurs. This preliminary action ensures the workpiece achieves sufficient collision velocity for effective cleaning without being slowed down by the driver during the impact moment.
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 solution effectively removes contaminants from fracture surfaces without damaging the interfaces, maintaining the accuracy of fit between workpiece parts and enabling efficient further processing, such as screwing, by using a vibration-driven mechanism that allows for pulsed acceleration and free impact on the hold-down element.
Implementation Method 1
a vibration device (40) for generating vibrations in the workpiece (80)
Implementation Method 2
a driver (44) that can be driven by the vibration drive (41) for accelerating the workpiece (80) in the direction of the hold-down element (30)
Data Source
Figure 1
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Figure 3~5
AI summary
The invention relates to a cleaning method and to a cleaning device (10) for cleaning at least one fracture face (88, 89) of a workpiece (80) produced by fracturing, the cleaning device (10) having at least one vibration device (40) for generating vibrations in the workpiece (80) and a workpiece holder (20) for holding the workpiece (80). According to the invention, the workpiece holder (20) has a support part (21) onto which the workpiece (80) is placed and a holding-down element (30) opposite the support part (21), between which the workpiece (80) is held with vertical play (33), and the vibration device (40) has a vibration drive (41) and a driver (44) driven by the vibration drive (41) for accelerating the workpiece (80) in the direction of the holding-down element (30), so that the workpiece (80) impacts the holding-down element (30) and impurities (98) fall off the fracture face (88, 89). (Figure 2)