Quadrilateral Can Deep Drawing With Punch-Die Temperature Control
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Solution Overview
Problem
During the deep drawing process of manufacturing metal cans, thermal expansion causes dimensional errors, especially in quadrilateral cans with rectangular cross-sections like battery cases. Existing methods require large amounts of coolant, increasing production steps and environmental concerns.
Innovation Solution
A press machine with a punch and/or die that includes a flow path for a heat medium, allowing for controlled temperature management to stabilize the dimensions of the can. This involves supplying a heat medium as a fluid to the punch and/or die to regulate temperature and prevent thermal expansion issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a large amount of coolant is supplied to reduce friction and prevent thermal influence, then the dimensional precision of the can is improved, but the number of production steps increases and environmental load increases due to degreasing and cleaning requirements
Solution Approach 1:
The invention extracts the harmful lubricating coolant from the deep drawing process and replaces it with a heat medium that circulates through flow paths in the punch and die. This eliminates the need for degreasing and cleaning steps while maintaining dimensional precision through thermal control alone.
Solution Approach 2:
The invention introduces a heat medium as an intermediary substance that serves dual purposes: it controls thermal expansion of the punch and die to maintain dimensional precision, and it eliminates the need for lubricating coolants that require environmental treatment. The heat medium circulates through embedded flow paths in the tooling.
2Ease of operation
If thermal expansion of the die is allowed to occur during production, then the ease of operation is improved, but the manufacturing precision deteriorates due to dimensional variations in the can
Solution Approach 1:
The invention changes the thermal parameter (temperature) of the punch and die by circulating a heat medium through embedded flow paths. This active temperature control compensates for thermal expansion during continuous production, maintaining dimensional accuracy while allowing uninterrupted operation.
Solution Approach 2:
The invention implements continuous temperature control through the heat medium circulation system, ensuring that the punch and die maintain stable dimensions throughout continuous production. This eliminates the need to stop production for tooling cooling while maintaining precision.
3Device complexity
If the temperature of the punch and die is not controlled, then the device complexity is reduced, but the productivity decreases due to increased number of discarded cans
Solution Approach 1:
The invention merges the temperature control function into the existing punch and die structures by embedding flow paths directly within them. This integration adds minimal complexity to the press machine while dramatically improving productivity by eliminating dimensional errors that cause can rejection.
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 solution improves production efficiency by reducing dimensional errors and the need for coolant, thereby simplifying the process and minimizing environmental impact. It allows for more stable can dimensions and reduces the number of discarded cans.
Implementation Method 1
the temperature of the can increases due to heat generated during the deep drawing, and as the temperature returns to room temperature, the dimensions of the can are reduced due to the influence of thermal expansion. In addition, since a die itself is also thermally expanded due to temperature
Implementation Method 2
supplying a heat medium as a fluid to a flow path provided inside a punch and/or a die to control a temperature of the punch and/or a temperature of the die
Data Source
AI summary
A method for manufacturing a can by deep drawing using a press machine, the can being a quadrilateral can having a rectangular opening, the method including controlling a temperature of a punch and/or a temperature of a die by supplying a heat medium as a fluid to a flow path provided inside the punch and/or the die.