Spring Manufacturing Apparatus Arm Cam Mechanism
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Solution Overview
Problem
Conventional spring manufacturing apparatuses with a single driving source face challenges in precision and cost due to mechanical linking of bending dice mounting sliders, which limits the ability to maintain constant speed and accuracy, especially when manufacturing springs with variable outer diameters.
Innovation Solution
The apparatus employs an arm with a swinging motion and a cam mechanism to interlock the movement of bending dice mounting sliders, allowing for precise control of the winding direction and speed, reducing the number of driving sources required and enabling more accurate spring formation by utilizing two driving sources instead of three.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single driving source is used to drive all bending dice mounting sliders via mechanical linkage, then the number of driving sources is reduced and cost is lowered, but the manufacturing precision deteriorates because the sliders cannot move at the same speed
Solution Approach 1:
The system divides the driving sources into two independent groups: one driving source directly drives the first bending dice mounting slider, while another driving source independently drives the second and third bending dice mounting sliders. This segmentation allows each slider to be controlled independently, resolving the speed synchronization issue while maintaining reduced device complexity compared to having three separate motors.
2Volume of moving object
If the arm swings with a short rotation radius to connect the sliders, then the device structure is compact, but the manufacturing precision deteriorates because the movement path deviates from a straight line
Solution Approach 1:
The arm mechanism is designed with a rotation radius that extends beyond the spacing between the bending dice mounting sliders, creating a larger arc path. By positioning the rotation center appropriately and using the arm's swinging motion in conjunction with the cam mechanism, the system achieves more accurate linear approximation of the slider movement paths, improving manufacturing precision.
3Device complexity
If the bending dice mounting sliders are mechanically linked via a swinging arm, then the number of driving sources is reduced, but the power consumption increases due to inefficiencies in mechanical transmission
Solution Approach 1:
The system replaces pure mechanical linkage with a hybrid approach combining direct motor-driven linear motion (using ball screws) for the first slider with a cam mechanism for controlling the swinging arm. This substitution reduces energy loss by eliminating excessive mechanical transmission stages while maintaining the benefit of having fewer driving sources.
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 configuration reduces power consumption and enhances manufacturing precision by allowing both bending dice mounting sliders to move at a constant speed, resulting in improved accuracy for springs with varying shapes and sizes.
Implementation Method 1
a ball screw directly attached to the rotating shaft of the driving source
Implementation Method 2
a groove cam mechanism, so that the moving direction of the bending dice, caused by the movement of the bending dice mounting slider, can be linearly approximated upward or downward by a predetermined angle
Data Source
AI summary
A spring manufacturing apparatus with a reduced number of driving sources, yet capable of adjusting the relative positions among the bending dices with higher precision when manufacturing a spring is to be provided. A second bending dice mounting slider and a third bending dice mounting slider are symmetrically located about a center line extended from a moving direction of a first bending dice mounting slider. An arm mechanically connects the first bending dice mounting slider and the second bending dice mounting slider, or the first bending dice mounting slider and the third bending dice mounting slider, so that either of a driving source that drives the second bending dice mounting slider or a driving source that drives the third-bending dice mounting slider moves the first bending dice mounting slider, thus to determine a winding direction of a wire for manufacturing a spring.