Electric Motor Stem Slide Mechanism for Extrusion Press Oil Leakage
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Solution Overview
Problem
The conventional extrusion pressing machines with rear loading and short stroke press type face issues with oil leakage and maintenance challenges due to the hydraulic drive system, which can lead to operational interruptions and safety hazards when the stem slide mechanism and heated container are close to each other during the extrusion process.
Innovation Solution
A stem slide apparatus with a vertically moving stem slide base driven by an electric motor and ball screw conversion unit, which replaces the hydraulic drive mechanism, ensuring safe operation and reducing maintenance needs by avoiding oil leakage and allowing for precise control and efficient billet loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hydraulic drive system is used for the stem slide mechanism, then the stem can be moved vertically to secure billet-supplying space, but oil leakage occurs and maintenance requirements increase due to proximity with heated container
Solution Approach 1:
The patent replaces the hydraulic drive system with an electric motor-driven mechanism. The electric motor (11) is connected through a ball screw (13) and ball nut (12) to drive the stem slide base (73) vertically, eliminating hydraulic oil and its associated leakage risks near heated containers.
Solution Approach 2:
The patent extracts and removes the hydraulic system components (hydraulic cylinder, hydraulic oil) from the stem slide mechanism, replacing them with a dry mechanical drive system that does not involve fluid leakage risks.
2Ease of operation
If a hydraulic drive system is used for the stem slide mechanism, then the stem can be moved vertically, but maintenance frequency increases and machine stoppages are required
Solution Approach 1:
The hydraulic system is replaced with an electric motor-driven ball screw mechanism that requires no periodic maintenance of hydraulic components, eliminating machine stoppages for oil system maintenance and improving operational continuity.
Solution Approach 2:
The electric motor-driven mechanism is designed to be maintenance-free in operation, with no hydraulic oil to monitor or replace, allowing the machine to operate continuously without periodic interruptions for hydraulic system maintenance.
3Reliability
If the stem slide base is driven by electric motor and ball screw, then oil leakage is eliminated and maintenance is reduced, but the mechanism complexity increases
Solution Approach 1:
While replacing hydraulic system with electric motor and ball screw mechanism does introduce different components, the overall complexity is reduced by eliminating hydraulic reservoirs, hoses, seals, and filtration systems, resulting in a cleaner and more maintainable drive system.
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 electric motor-driven stem slide apparatus reduces the risk of oil leakage, minimizes maintenance requirements, and enhances operational efficiency, improving productivity and safety by eliminating the need for frequent machine stoppages and reducing energy consumption.
Implementation Method 1
a ball screw conversion unit having a threaded shaft and a ball nut for converting the rotation of the output shaft of the electric motor into the linear motion
Data Source
AI summary
A stem slide apparatus comprises a stem slide base (73) with a stem (6) horizontally mounted thereon to press a billet (B) mounted on a container (5), a slide guide member (72, 72a, 72b) mounted on a vertical stem move support member (71) and formed with guide grooves in which the side end portions of the stem slide base are fitted and vertically slid, and a lock means (77a, 77b) arranged on the slide guide member to press the side end portions of the stem slide base. The stem slide apparatus further comprises a drive mechanism (10) having an electric motor (11) to move the slide base in the sliding direction. Therefore the indirect cause of a fire is removed and the maintenance work simplified.