Saw Blade Cutting Edge Machining with Free-Running Path Compensation
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Solution Overview
Problem
Existing methods for processing cutting tools, such as circular saw blades and band saw blades, face challenges in achieving desired surface quality and efficiency, particularly when dealing with cutting tools of unequal pitch and those that are partially worn, leading to increased processing time due to long idle paths and varying tooth geometries.
Innovation Solution
A method that involves selecting a cutting edge, determining a starting point, approaching it at an approach speed, executing a machining movement, detecting the free-running distance to the contact point, and adjusting the machining tool's path to minimize idle time, allowing for dynamic optimization of the machining process based on detected contact and end points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If real-time contact detection is used to control machining process, then machining quality is improved, but processing time increases due to long idle paths
Solution Approach 1:
The patent applies preliminary action by pre-determining the contact point position before machining begins. The system uses a pre-determined contact point approach where the machining tool is guided to approach the cutting edge at a calculated position rather than relying on real-time contact detection. This allows the tool to start machining immediately at the correct position, eliminating the need for long idle paths and real-time contact sensing, thus reducing processing time while maintaining machining quality.
2Productivity
If machining tool approaches at high speed, then productivity is improved, but machining quality deteriorates due to loss of control near contact point
Solution Approach 1:
The patent applies dynamics by implementing a two-speed approach strategy. The machining tool approaches the cutting edge at a first high speed during the idle path to maximize productivity, then automatically reduces to a second lower speed when reaching the pre-determined contact point to ensure precise control and high machining quality. This dynamic speed adjustment allows the system to maintain both high productivity and high surface quality without compromise.
3Measurement precision
If conventional contact detection methods are used, then positioning accuracy is improved, but device complexity increases due to additional sensors and control systems
Solution Approach 1:
The patent applies copying by using the known geometric model (copy) of the cutting edge to determine the contact point position, rather than using physical sensors to detect it in real-time. The system relies on pre-stored geometric data about the cutting edge shape and dimensions to calculate where contact will occur, eliminating the need for complex sensor systems and real-time detection apparatus while maintaining high positioning accuracy.
Data Source
Figure 1~2
Figure 3a~3c
Figure 3d~3f
AI summary
The invention relates to a device and a method for machining a plurality of cutting edges (50) of a cutting tool, in particular a circular saw blade (12) or a band saw blade, with a machining tool (32) comprising the steps: A) selecting a cutting edge (50) of the cutting tool to be machined; B) selecting a starting point (S) with respect to the selected cutting edge (50) of the cutting tool to be machined; C) approaching the selected starting point (S) of the cutting edge (50) to be machined with the machining tool (32) at an approach speed;D) Performing a machining movement on the selected cutting edge (50) to be machined with the machining tool (32), wherein the machining movement originates from the starting point (S), extends along a machining surface of the selected cutting edge (50) to be machined, and ends at an endpoint (E) of the machining, and wherein the machining movement is performed at a machining speed; E) Determining a free-running distance (F) along the machining movement on the selected cutting edge (50) to be machined between the selected starting point (S) and a contact point (K) where the machining tool (32) first touches the cutting edge (50) to be machined; and F) Approaching the contact point (K) on a subsequent cutting edge (50) to be machined by the machining tool at the approach speed, taking into account the free-running distance (F) determined in step E).