Rotary Nail-Head Forming With Eccentric Wheels and Cam Punches
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Solution Overview
Problem
Conventional nail-making machines face limitations in productivity and quality, with linear crank-type machines restricted by low production speed and rotating drum-type machines limited in forming various nail head shapes.
Innovation Solution
A high-speed and high-quality nail-making system is developed, combining the inner wheel's high-speed rotation and eccentric disposition with the outer wheel's larger size to facilitate rapid transfer and shaping of steel wire pieces, using a plurality of punches linearly reciprocated by a cam device to form nail heads and an ejector for efficient discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a linear crank-type nail-making machine is used, then high-quality nail heads with various shapes can be formed, but production speed is limited and productivity is low
Solution Approach 1:
The invention transforms the static linear crank mechanism into a dynamic rotating drum structure with multiple punching units that can rotate at high speed. The punching units are linearly reciprocated through cam mechanisms while the drum rotates, enabling simultaneous high-speed operation and precise nail head formation. This dynamic conversion resolves the contradiction between speed and precision.
Solution Approach 2:
The invention divides the single punching unit into multiple punching units (first, second, third, and fourth punching units) arranged around the rotating drum. Each punching unit can independently form different nail head shapes, allowing parallel processing of multiple nails simultaneously. This segmentation increases productivity while maintaining the precision capability of individual punching units.
2Productivity
If a rotating drum-type nail-making machine is used, then high-speed production is achieved, but the ability to accurately form nails with various shapes is limited
Solution Approach 1:
The rotating drum is designed to accommodate multiple punching units with different punching configurations. The drum structure itself is universal, capable of supporting various types of punching units that can form different nail head shapes. This multi-functionality allows the high-speed rotating drum mechanism to maintain precision capability for various nail shapes.
Solution Approach 2:
The invention introduces cam mechanisms as intermediary elements that translate the rotational motion of the drum into linear reciprocating motion of the punching units. The cam mechanisms act as mediators that preserve the precision of nail head formation while enabling high-speed rotation. The cam profiles are specifically designed to control the punching motion accurately during high-speed operation.
3Productivity
If the inner wheel is rotated at high speed for rapid transfer, then productivity increases, but the formation of various nail head shapes becomes more difficult
Solution Approach 1:
The punching units are designed to perform periodic linear reciprocating motions synchronized with the rotation of the inner wheel. During each rotation cycle, the punching units receive steel wire pieces at high speed and perform punching operations at specific periodic intervals. This periodic action allows the system to maintain high transfer speed while ensuring precise nail head formation during the punching phase.
Solution Approach 2:
The steel wire pieces are preliminarily positioned and clamped by the inner wheel before the punching operation. The inner wheel performs preliminary transfer and positioning actions at high speed, preparing the steel wire pieces for subsequent precise punching. This preliminary action separates the high-speed transfer function from the precision punching function, resolving the contradiction between speed and precision.
4Productivity
If the outer wheel is passively rotated with larger size to facilitate discharge, then productivity improves, but the space for punching operation is reduced
Solution Approach 1:
The outer wheel is designed with an asymmetric configuration where the diameter varies around the circumference. The larger diameter portions are positioned to facilitate discharge space, while the smaller diameter portions are positioned to maintain adequate punching space. This asymmetric design allows the outer wheel to simultaneously provide sufficient discharge efficiency and punching operation space.
Solution Approach 2:
The invention utilizes the radial dimension of the concentric wheel structure to resolve the space conflict. The inner wheel and outer wheel are arranged in the radial direction, creating multiple operational zones. The punching operation occurs in the radial space between the wheels, while the discharge function utilizes the tangential space created by the outer wheel's rotation. This dimensional arrangement allows both functions to coexist without significant space conflict.
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
This system significantly enhances productivity and quality by enabling the rapid formation of high-quality nail heads with precise shaping and efficient discharge, improving merchantability and yield while reducing defects.
Implementation Method 1
a plurality of punches, which are rotated together with the inner wheel and are linearly reciprocated by a cam device
Implementation Method 2
an inner wheel, which has a smaller size and is rotated in one direction at high speed, is eccentrically disposed in an outer wheel, which has a larger size and is passibly rotated, so as to be closest thereto at a punching portion or a shaping portion
Data Source
AI summary
A high-speed and high-quality nail-making system is disclosed. The system includes an inner wheel, which is rotated by a motor and a power transmission unit and which clamps and transfers steel wire pieces, an outer wheel, which is passively rotated and which is eccentrically disposed outside the inner wheel so as to press the steel wire pieces at a punching portion, at which the outer wheel is positioned closest to the inner wheel, inner and outer wheel dies, which are mounted on the inner wheel and the outer wheel and which are positioned closest to each other at the punching portion so as to grip the steel wire pieces, a punching unit, which is rotated together with the inner wheel and which punches front ends of the steel wire pieces to form nail heads, and an ejector disposed between the inner wheel and the outer wheel so as to discharge the finished nail.