Electric Riveting Device for Clean Environment Plastic Deformation
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Solution Overview
Problem
Existing devices for applying force to connection elements for plastic deformation in machine tools often require hydraulic or pneumatic drives, which can contaminate clean environments and have high maintenance costs, making them unsuitable for precision mechanics and medical technology applications.
Innovation Solution
A compact, electrically driven device with a movably mounted machining head and modular design, featuring a linear drive for translation and a rotary drive for circular motion, eliminating the need for hydraulic or pneumatic components and allowing integration into machine tools with high cleanliness requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If hydraulic or pneumatic drives are used to apply force to connection elements, then sufficient deformation force can be achieved, but contamination of the tool chamber occurs and maintenance costs increase
Solution Approach 1:
The patent replaces hydraulic or pneumatic drive systems with an electric drive system consisting of a motor and a ball screw mechanism. This substitution eliminates the harmful effects of hydraulic fluid leakage or pneumatic contamination while maintaining the capability to generate sufficient deformation force for plastic deformation of connection elements.
Solution Approach 2:
The patent explicitly avoids using hydraulic or pneumatic systems by choosing an electric drive alternative, thereby preventing the contamination issues associated with fluid-based drive systems in clean room environments.
2Force
If hydraulic or pneumatic drives are used, then sufficient deformation force can be achieved, but device complexity and maintenance requirements increase
Solution Approach 1:
The complex hydraulic or pneumatic drive systems are replaced with a simpler electric motor and ball screw mechanism. This reduction in system complexity decreases maintenance requirements while preserving the ability to generate the necessary deformation force.
3Volume of moving object
If a compact design is implemented, then space requirements are reduced, but integration of drive systems becomes more difficult
Solution Approach 1:
The patent employs a nested design where the ball screw mechanism is integrated within the existing tool holder structure, and the motor is mounted on the tool holder. This nesting approach achieves compact dimensions while simplifying integration into machine tools by utilizing existing structural spaces.
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 device provides a low-maintenance, contamination-free solution for applying force to connection elements, enabling precise and efficient plastic deformation in clean environments with reduced space requirements and adaptable to various force and motion patterns.
Implementation Method 1
a linear drive (13) for driving a translation (16) of the head part (16) along a longitudinal axis (L) of the head part
Implementation Method 2
a rotary drive (8) for driving a rotation (17) of the machining head (7) about the longitudinal axis (L)
Implementation Method 3
the connection element is plastically deformed by the application of force
Data Source
AI summary
The application relates to a device for applying an applied force to a connection element such that the connection element is plastically deformed by the application of force. The device comprises a movably mounted head part with a machining head which is designed to contact the connection element; a drive which is designed to drive a translation of the head part in the longitudinal axis thereof; a second drive which is designed to drive a rotation of the machining head about a longitudinal axis; and a housing for receiving the first drive, the second drive, and the head part. The first drive and the second drive are electrically driven and are arranged coaxially. The application further relates to a method for operating a device according to the application and to the use of a device according to the application as an electric riveting machine.