Gear Cutting Machine Adjusting Structure for Vibration Damping
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Solution Overview
Problem
Gear cutting machines experience unwanted vibrations due to oscillating components, leading to manufacturing deviations such as ripples on tooth flanks, which result in high-frequency noise and 'ghost frequencies' in gearboxes.
Innovation Solution
A motor-driven adjusting device for gear cutting machines, featuring a base body, a movable body, and a drive system, with an auxiliary body that forms a rigid connection with the base body and is moved with the movable body, utilizing vibration dampers between the auxiliary and movable bodies to efficiently dampen vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If vibration dampers are added to reduce vibrations, then manufacturing precision improves, but device complexity increases
Solution Approach 1:
The auxiliary body is nested within or alongside the base body structure, with vibration dampers integrated between them. This nesting approach allows the damping function to be incorporated into the existing adjusting device structure without requiring completely separate external damping systems, thereby improving manufacturing precision while limiting the increase in device complexity.
Solution Approach 2:
The auxiliary body acts as an intermediary element between the base body and the movable body, with vibration dampers serving as mediators to reduce vibrations. This intermediary structure provides a dedicated path for vibration damping while maintaining the primary adjusting function, resolving the contradiction between improved precision and increased complexity.
2Manufacturing precision
If rigid connection is formed between auxiliary body and base body, then vibration damping improves, but positioning speed decreases
Solution Approach 1:
The connection between the auxiliary body and base body is designed to be dynamic rather than statically fixed. The vibration dampers provide rigid damping during machining operations while allowing controlled movement during positioning phases, enabling the system to adapt its connectivity based on operational requirements and thus improving vibration reduction without permanently sacrificing positioning speed.
Solution Approach 2:
The system alternates between different connection states: during positioning operations, the auxiliary body can be loosely connected to allow fast movement, and during machining operations, the rigid connection is engaged for vibration damping. This periodic switching between connection states resolves the contradiction between vibration reduction and positioning speed.
3Manufacturing precision
If auxiliary body is moved with movable body, then vibration damping effectiveness improves, but additional load on drive system increases
Solution Approach 1:
The auxiliary body is designed to move with the movable body only in specific local regions where vibration damping is most effective, rather than requiring the entire drive system to move the full auxiliary body mass. This localized approach maintains vibration control effectiveness while minimizing the additional power burden on the drive system.
Solution Approach 2:
The system changes operational parameters by selectively engaging the auxiliary body movement based on machining conditions. During high-vibration machining operations, the auxiliary body is engaged to move with the movable body for enhanced damping. During low-vibration or positioning operations, the auxiliary body remains stationary or loosely connected, reducing the power load on the drive system and thus resolving the contradiction between vibration control and power consumption.
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 adjusting device effectively reduces vibrations between the movable and base bodies, minimizing manufacturing deviations and high-frequency noise, while allowing for fast positioning movements without significant additional load on the drive system.
Implementation Method 1
The adjusting device (1) comprises at least one vibration damper (11), which is arranged between the auxiliary body (10) and the movable body (2)
Data Source
AI summary
An adjusting device for a machine tool comprises a base body (1), a movable body (2) movable along a moving direction (X) relative to the base body, and a drive (3) for moving the movable body relative to the base body. In order to effectively damp vibrations between the movable body and the base body (in particular so-called stray vibrations) and yet still enable rapid positioning movements of the movable body relative to the base body, the adjusting device comprises an auxiliary body (10) which can be releasably fixed to the base body and, in the released state, can be moved together with the movable body relative to the base body. The adjusting device also comprises at least one vibration damper (11) which is arranged between the auxiliary body and the movable body.