Machine Tool Spindle Drive with Independent Motor Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Drilling machines struggle when working with components composed of multiple layers of different materials, as they require specific optimum speeds for each layer, leading to suboptimal drilling conditions and quality in other layers, resulting in degraded bore quality and prolonged drilling times.
Innovation Solution
A machine tool with a control unit that independently adjusts the speed of rotation of two drive motors, allowing for customizable speed ratios and torque adjustments based on material characteristics, enabling optimal drilling conditions for each layer by measuring output torque and modifying motor speeds accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the drilling machine is adjusted to satisfy the optimum conditions for drilling one layer, then the drilling quality for that layer is improved, but the drilling quality and efficiency for other layers deteriorates
Solution Approach 1:
The patent applies dynamics by making the drive system adjustable and adaptable rather than fixed. The mechanical linkage between rotation and advance is made variable through adjustable mechanisms that allow the operator to change the advance per revolution ratio. This enables the system to dynamically adapt to different material layers by modifying the kinematic parameters, thereby resolving the contradiction between optimizing for one material while maintaining performance across multiple materials.
Solution Approach 2:
The patent implements parameter changes by allowing independent adjustment of rotation speed and advance per revolution parameters. The control system enables modification of these parameters to match the specific requirements of each material layer being drilled. By changing these operational parameters, the system can optimize drilling quality for each layer while maintaining overall system performance across heterogeneous materials.
2Manufacturing precision
If the spindle advance per revolution is kept constant through mechanical linkage, then surface quality and bore precision are improved, but the ability to optimize drilling conditions for different material layers is lost
Solution Approach 1:
The patent transforms the static mechanical linkage into a dynamic, adjustable system. Instead of a fixed mechanical connection between rotation and advance, the system incorporates adjustable mechanisms that allow the advance per revolution ratio to be modified. This dynamic capability enables maintenance of precise bore quality through controlled advance while allowing optimization of drilling speed and efficiency for different material layers, thus resolving the contradiction between precision and productivity.
Solution Approach 2:
The patent segments the drive system into independently controllable components - the rotation drive and the advance mechanism. By separating these functions while maintaining a controlled relationship through adjustable linkage, the system can optimize rotation speed for productivity while independently controlling advance per revolution for precision. This segmentation allows each parameter to be optimized for its specific function while working together harmoniously.
3Ease of operation
If two separate motors are used to drive rotation and advance, then independent speed control is achieved, but the system complexity increases
Solution Approach 1:
The patent merges the rotation and advance drive functions into a single integrated drive mechanism with adjustable linkage. Instead of using two completely separate motor systems, the invention combines them into one system where a single motor drives both functions through a mechanically adjustable connection. This merging reduces overall system complexity while maintaining the essential capability of independent speed control through the adjustable linkage ratio.
Solution Approach 2:
The patent creates a universal drive system where a single motor performs multiple functions - driving both rotation and advance of the spindle. The adjustable mechanical linkage allows this single motor to effectively provide independent control of both parameters by changing the transmission ratio. This multi-functionality approach reduces the number of separate components needed while maintaining operational flexibility and ease of control.
Data Source
AI summary
The present invention describes a machine to that includes a casing and a toolholder spindle. The machine tool further includes a drive mechanism that drives the toolholder spindle. The drive mechanism includes first and second drive members. The first drive member rotates the spindle about its axis. The second drive member translates the spindle and is screwed onto the spindle in such a way that the spindle advances or reverses as a function of the relative speed of rotation between the first and second drive members. The machine tool also includes a first motor and a second motor. The first motor rotates the first drive member and the second motor rotates the second drive member. The machine too further includes a control unit that controls and adjusts the speed of rotation of the first motor and the second motor independently.