On-Vehicle Brake Lathe Reporting System
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Solution Overview
Problem
Existing brake lathe systems lack comprehensive tracking and recording capabilities, particularly for inexperienced operators, and are prone to false indications due to irregular disk surfaces, leading to inefficient and potentially incorrect machining operations.
Innovation Solution
A lathe reporting system that includes a microprocessor, operator interface, and addressable temporary memory to track and record machining operations, using thickness and contact sensors to validate cutting status and provide warnings, ensuring accurate recording and operator guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electrical conductivity sensors are used to monitor contact of tool bits with disk surfaces, then cutting completion can be detected, but the process becomes extremely time consuming due to requirement of multiple passes with increasing depth of cut
Solution Approach 1:
The patent sets the tool bits at a predetermined depth of cut position before machining begins. This preliminary positioning eliminates the need for multiple iterative passes with increasing depth, allowing the cutting operation to proceed directly at the correct depth and significantly reducing machining time while maintaining accurate cutting completion detection
Solution Approach 2:
The invention skips the time-consuming iterative process of multiple passes with gradually increasing depth of cut. By directly positioning the tool bits at the final required depth and using vibration analysis to detect cutting completion, the system rushes through the machining process in a single pass, dramatically improving productivity
2Ease of operation
If instantaneous contact signals are used to determine cutting completion, then real-time feedback is provided, but false indications occur when disk surfaces are irregular
Solution Approach 1:
The patent uses vibration sensors to continuously monitor cutting vibrations and provides real-time feedback on cutting status. The system analyzes vibration patterns to determine when cutting is complete, offering reliable real-time feedback that is not susceptible to false indications from irregular disk surfaces
Solution Approach 2:
The invention replaces electrical conductivity sensors with vibration sensors to detect cutting completion. This substitution uses mechanical vibration analysis instead of electrical contact detection, eliminating the problem of false indications caused by irregular disk surfaces while maintaining real-time monitoring capability
3Manufacturing precision
If multiple passes with increasing depth of cut are performed to ensure complete machining, then cutting completion can be verified, but the machining process becomes extremely time consuming
Solution Approach 1:
The system performs preliminary positioning of the tool bits at the exact final depth of cut before the machining operation begins. This eliminates the need for multiple passes with progressively increasing depth, allowing the cutting to be completed in a single pass while ensuring complete material removal through vibration-based completion detection
Solution Approach 2:
The patent uses vibration signal patterns as a reference to determine cutting completion. By analyzing the characteristic vibration signature that occurs when cutting is complete, the system can verify cutting completeness in real-time without requiring multiple verification passes, thus ensuring manufacturing precision while minimizing time loss
Data Source
AI summary
A reporting system, employing a microprocessor, tracks the operation of an on-vehicle brake lathe and provides records of the resurfacing operations performed by the lathe. Identification of the vehicle and wheel position of a brake disk to be resurfaced are inputted using an operator interface, and stored in a temporary memory. When tool bits of the lathe are positioned to set a depth of cut, a thickness monitor indicates the resulting thickness for the brake disk, which is compared to a minimum thickness specification for the inputted vehicle and wheel position to determine whether the disk can be resurfaced to meet the specification. If so, a cutting operation evaluator monitors a continuity checker that is responsive to contact of the tool bits and the disk to determine when the resurfacing operation is complete, at which time the collected data can be reported.