Die Cavity Modifying Machine with Vibration Dampening
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Solution Overview
Problem
Existing machines for modifying die cavities to prevent slug pulling during stamping operations are inefficient and produce unwanted noise due to vibration, and there is a need for a more accurate and quicker method to machine slug retention grooves.
Innovation Solution
A machine with an adjustable and vibration-dampened machining head that forms elongate slug retention grooves in the die cavity sidewall, equipped with a rotary cutting or grinding bit and a slide arrangement for precise movement, and an imaging system for real-time inspection to ensure accurate groove depth, along with removable and position-adjustable stops to minimize noise and enhance precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a machining head with travel stops is used to machine slug retention grooves, then manufacturing precision of groove depth is improved, but noise and vibration are generated that mask the sound of bit-contact feedback
Solution Approach 1:
A vibration dampening arrangement is introduced as an intermediary element between the machining head and the travel stops. This intermediary absorbs and reduces the vibration and noise generated when the machining head contacts the stops, allowing the operator to hear the bit-contact sound feedback while maintaining the precision depth limiting function of the stops.
Solution Approach 2:
The vibration dampening arrangement is positioned to cushion the impact before it propagates through the machining head. By placing the dampening element between the machining head and the stops, the harmful vibrations are absorbed in advance, preventing them from masking the critical bit-contact audio feedback.
2Productivity
If a rotary cutting or grinding bit is used to machine grooves, then productivity is improved, but vibration and chatter are generated that affect machining accuracy
Solution Approach 1:
The vibration dampening arrangement provides beforehand cushioning to counteract the vibration and chatter generated by the high-speed rotary cutting or grinding bit. This allows the bit to maintain contact with the die cavity sidewall at high speeds without the vibrations masking the audio feedback needed for precision control.
Solution Approach 2:
The system uses audio feedback from the bit contacting the die cavity sidewall to maintain precise groove depth. The vibration dampening arrangement ensures this feedback remains audible despite the high-speed machining operations, allowing the operator to hear when the bit reaches the desired depth.
3Adaptability or versatility
If the machining head travels the full range to machine grooves in thinner dies, then adaptability is improved, but noise from stop contact masks the bit-contact sound feedback
Solution Approach 1:
The vibration dampening arrangement serves as an intermediary that allows the machining head to travel the full range needed for thinner dies while preventing the noise from stop contact from masking the critical bit-contact audio feedback. This enables adaptability to various die thicknesses without sacrificing audio feedback quality.
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
The machine effectively prevents slug pulling, reduces noise, and increases the accuracy and speed of slug retention groove machining, allowing for more uniform groove depth and improved production rates, even with thinner dies.
Implementation Method 1
A vibration dampening arrangement is provided that absorbs and dampens, reduces, or otherwise isolates vibration caused by rotating bit contact with the cavity sidewall
Implementation Method 2
a machine tool equipped with a groove machining insert that preferably is a rotary cutting or grinding bit used to machine the slug retention groove
Data Source
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AI summary
A portable and transportable die cavity modifying machine having a base carrying a carriage adjustable along one axis, e.g., a generally horizontal axis, and a machining head adjustable along another axis, e.g., a generally vertical axis, for modifying a die cavity of a stamping die in a manner that prevents blank or slug pulling during stamping press operation. The machine includes a stop that is adjustably connected to the carriage. The stop is configured to limit movement of the machining head along the generally vertical axis. The machine may also feature a vibration isolator that is used with the stop to prevent noise and vibration that result from movement of the machining head in relation to the stop. Additionally, the machine may include an optical device capable of capturing an image of the die cavity defining sidewall as the rotary grinding bit machines the elongate slug retention groove.