Automatic Chuck Greasing Device for Crankshaft Miller
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Solution Overview
Problem
Conventional automatic greasing devices for chucks in crankshaft millers fail to ensure timely greasing and proper removal of excess grease, leading to decreased workpiece clamping accuracy and potential chuck malfunctions due to accumulated grease stains.
Innovation Solution
An automatic greasing device for chucks that integrates a rotary cutter life determination unit, greasing command signal output unit, grease supply device, and notification means to ensure timely greasing and cleaning, utilizing a NC device to coordinate grease supply and notification during rotary cutter replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual greasing is performed by a worker, then the grease can be supplied to sliding parts, but the worker may forget to perform greasing work and excess grease cannot be removed timely
Solution Approach 1:
The system performs greasing automatically without human intervention by using the CNC controller to trigger the grease supply device based on rotary cutter usage data, eliminating the need for manual operation while ensuring reliability
Solution Approach 2:
The system uses feedback from the rotary cutter life determination unit to automatically control the timing of grease supply, creating a closed-loop system that adjusts greasing based on actual usage conditions
2Extent of automation
If conventional automatic greasing device is used, then greasing is performed at predetermined time intervals, but excess grease accumulates on chuck surface causing chips to adhere and accumulate
Solution Approach 1:
The system changes the greasing parameter from fixed time intervals to usage-based timing determined by rotary cutter life, optimizing the greasing moment to prevent excess grease accumulation while maintaining automation
Solution Approach 2:
The system determines the optimal greasing timing in advance based on rotary cutter life prediction, performing greasing proactively before excessive wear occurs rather than at fixed intervals
3Reliability
If greasing is performed frequently, then sliding parts are well lubricated, but excess grease overflows and stains the chuck exterior surface
Solution Approach 1:
The system optimizes the greasing parameter by switching from fixed-time intervals to usage-based timing, delivering the precise amount of grease needed at the optimal moment to prevent both insufficient lubrication and excessive overflow
Data Source
AI summary
To provide an automatic chuck greasing device in a crankshaft miller capable of ensuring chuck greasing without missing its timing and preventing failure to remove excess grease by wiping. In a crankshaft miller (1) which cuts, using a rotary cutter (7), a workpiece (2) held by a chuck (3), the automatic greasing device includes: a grease supply device (25) for supplying grease to sliding parts inside a chuck (3) including one between a chuck body (3a) and a chuck jaw (3b) in response to a greasing command signal outputted by a greasing command signal output unit (35) which has received a rotary cutter replacement command signal as a trigger signal from a rotary cutter replacement command signal output unit (33); and a notification means (30a, 30b) for notifying that a cutter (7) needs replacement in response to a notification command signal outputted by a notification command signal output unit (36) which has received the rotary cutter replacement command signal as the trigger signal from a rotary cutter replacement command signal output unit (33).