Machining Head Balancing Device for Small-Diameter Tools
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Solution Overview
Problem
Existing machining heads for gear manufacturing machines are inadequate for tools with small diameters, as conventional balancing systems cannot accommodate the necessary balancing heads, leading to reduced imbalance compensation capacity and limitations in machining workpieces prone to collisions.
Innovation Solution
A machining head with integrated balancing devices within the motor spindle and counter-spindle, allowing for adjustable balancing weights and vibration sensing to compensate imbalances, enabling the use of tools with very small diameters and preventing collisions during gear manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional balancing systems are used in machining heads, then balancing capacity is sufficient for large-diameter tools, but the system cannot accommodate small-diameter tools due to insufficient space for balancing heads
Solution Approach 1:
The balancing device is merged with the motor spindle structure, where the balancing weights are integrated into the spindle housing rather than being separate components. This combination allows the balancing function to be incorporated into the existing spindle volume, enabling small-diameter tool accommodation while maintaining balancing capability
Solution Approach 2:
The balancing weights are nested within the motor spindle housing, with the balancing mechanism contained inside the existing spindle structure. This nesting approach maximizes space utilization and allows the balancing system to function within the limited volume of small-diameter spindles
2Reliability
If balancing heads are mounted externally on the tool arbor, then balancing function is provided, but the tool arbor diameter must be large enough to accommodate the balancing heads
Solution Approach 1:
The balancing function is extracted from the tool arbor and relocated to the motor spindle. By removing the balancing heads from the tool arbor and integrating them into the spindle structure, the system eliminates the need for large tool arbor diameters while maintaining effective imbalance compensation
Solution Approach 2:
The motor spindle acts as an intermediary structure that provides the balancing function. Instead of requiring the tool arbor to accommodate balancing components, the spindle serves as the intermediate platform for housing the balancing mechanism, decoupling the balancing requirement from tool arbor dimensions
3Volume of moving object
If the balancing device is integrated within the motor spindle, then small-diameter tools can be used, but the space for balancing components is limited
Solution Approach 1:
The balancing weights are positioned at specific locations within the spindle housing where they can effectively counterbalance vibrations. By optimizing the local placement and configuration of balancing components within the limited space, the system achieves effective vibration reduction despite the constrained volume
Solution Approach 2:
The balancing mechanism uses adjustable weights that can be positioned at different radial distances and angular positions. By changing the parameters of weight position and distribution, the system can compensate for various imbalance conditions within the limited space available in the spindle housing
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 use of small-diameter tools by providing a two-plane balancing system within the spindle housings, ensuring effective imbalance compensation and preventing tool collisions, thus improving machining accuracy and efficiency for collision-prone workpieces.
Implementation Method 1
If a body rotates about an axis of rotation, outwardly acting centrifugal forces arise. If the mass is uniformly distributed in the rotational body, the centrifugal forces cancel each other out and the body remains in situ during the rotation. If, in contrast, the mass is unevenly distributed, additional forces and torques act on the body which cause a relative movement of the rotational body with respect to the axis of rotation.
Implementation Method 2
Tools having a large amount of imbalance have a negative effect on many aspects of machining. For example, an imbalanced tool may produce a poorer surface quality in machined workpieces due to vibrations at a tool holder holding the tool, oscillations at the tool holder
Data Source
AI summary
The present disclosure relates to a machining head for a gear manufacturing machine having at least one driven motor spindle and at least one counter-spindle, wherein a tool arbor having at least one tool arranged thereon is mounted between the motor spindle and the counter-spindle, and wherein at least one balancing device is integrated within the driven motor spindle and at least one balancing device is integrated within the counter-spindle.