Rectangular Container Trimming With Multi-Axis Punch Motion
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Solution Overview
Problem
Existing trimming technologies for rectangular containers face challenges such as complex mechanisms, high operational costs, and inefficiencies in trimming rectangular shapes, leading to issues like matching burrs and deformation, particularly due to the need for skilled operators and costly gear mechanisms.
Innovation Solution
A trimming device with a punch and die system that uses independent drive units to move the punch in multiple directions, allowing for continuous trimming without deformation, and incorporates a weak portion forming mechanism to reduce cutting loads and prevent burrs, eliminating the need for advanced cam mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cam mechanism is used to convert longitudinal motion of a press slide into arc motion of a punch for trimming, then trimming can be performed on drawn products, but the mechanism configuration becomes complicated requiring skilled technicians for design, adjustment, and maintenance
Solution Approach 1:
The patent replaces the cam mechanism with an electric motor that directly drives the punch through linear motion. This substitution eliminates the complex mechanical conversion system while achieving the same trimming function, thereby reducing device complexity and easing operation without requiring skilled technicians for cam adjustment and maintenance
Solution Approach 2:
The patent extracts and removes the cam mechanism from the trimming system, keeping only the essential punching function. By taking out the unnecessary mechanical conversion components (cam, follower, linkages), the system becomes simpler while maintaining its core trimming capability through direct electric motor drive
2Productivity
If a cam mechanism is used to convert longitudinal motion into arc motion, then trimming can be performed, but a large stroke length of the press is required
Solution Approach 1:
The patent replaces the cam-based arc motion generation with direct linear motion from an electric motor. This eliminates the need for large stroke lengths required by cam mechanisms to achieve the same punching depth, as the motor can be positioned closer to the punch and provide direct vertical drive without mechanical conversion losses
Solution Approach 2:
The patent changes the motion dimension from arc motion (requiring horizontal space and large stroke) to direct linear vertical motion. By driving the punch in the same dimension as the press slide movement, the system eliminates the need for stroke length extension while maintaining trimming effectiveness
3Adaptability or versatility
If gear mechanism and link mechanism are used to convert rotational motion of electric motor into circumferential motion of punch, then trimming can be performed, but when plate thickness or shape changes, the gear mechanism and link mechanism require readjustment or redesign, degrading production efficiency
Solution Approach 1:
The patent replaces the gear and link mechanisms with a direct electric motor drive system. This eliminates the need for mechanical readjustment or redesign when plate thickness or shape changes, as the electric motor can be easily reprogrammed or repositioned to accommodate different trimming requirements, thereby maintaining high production efficiency while improving adaptability
Solution Approach 2:
The patent introduces dynamic controllability through electric motor drive, allowing the punching parameters (depth, speed, position) to be easily adjusted for different plate thicknesses and shapes without mechanical reconfiguration. This dynamic adaptability enables quick changes between production runs without degrading overall productivity
4Ease of manufacture
If a punch with inclined shape formed complicatedly and highly accurately is used for cutting obliquely at the start of trimming, then trimming can be initiated, but the running cost and manufacturing cost increase
Solution Approach 1:
The patent replaces the need for complicatedly formed inclined punches with a simple vertically moving punch driven by an electric motor. The trimming action is achieved through the motor-controlled linear motion rather than through pre-formed inclined punch geometry, significantly reducing manufacturing complexity and cost while maintaining the required cutting precision
Solution Approach 2:
The patent performs the trimming action through controlled motor drive rather than relying on pre-formed punch geometry. The electric motor provides the necessary motion control and force application directly, eliminating the need for expensive precision-forming of inclined punch shapes while achieving the same trimming result
Data Source
Figure 1A~1E
Figure 2
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AI summary
Provided is a trimming device 1 for a rectangular container configured to cut a rectangular container 100 along a trim line 100A, and includes: a die 10, which accommodates an outer periphery of the rectangular container 100, and is arranged along the trim line 100A on a lower side thereof; a punch 20 movable within a plane parallel to a bottom surface 101; a long-axis direction drive unit 61 configured to move the punch 20 along a long-axis direction of the rectangular container 100; a first short-axis direction drive unit 62, which is arranged on a proximal side of the long-axis direction drive unit 61, and is configured to move the punch 20 along a short-axis direction; and a second short-axis direction drive unit 63, which is arranged side by side with the first short-axis direction drive unit 62 along the long-axis direction on a distal side from the long-axis direction drive unit 61, and is configured to move the punch 20 along the short-axis direction of the rectangular container 100.