Sewing Direction Control Apparatus for Cylinder Bed Heads
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Solution Overview
Problem
Existing computer control sewing machines face challenges in maintaining accurate sewing direction due to the need for precise control of sewing product movement, leading to poor stitching and high manufacturing and maintenance costs, and are not applicable to sewing machines with cylinder bed heads.
Innovation Solution
A low-cost sewing direction control apparatus featuring a base plate with X-Y planar surface, a circular ring-shaped transmission element, and a slide rack with Y-direction and X-direction displacement mechanisms, utilizing teeth engagement for accurate and intermittent movement, allowing the sewing product to be rotated and aligned with the needle for consistent stitching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a manipulator arm with three rotation axes is used to control sewing product movement, then sewing direction accuracy is improved, but manufacturing and maintenance cost increases
Solution Approach 1:
The patent replaces the expensive manipulator arm with a cost-effective combination of a rotating clamp and a moving clamp. The rotating clamp rotates the sewing product to adjust sewing direction, while the moving clamp positions the sewing product on the work platform. This substitution significantly reduces manufacturing and maintenance costs while maintaining sewing accuracy.
Solution Approach 2:
The patent divides the sewing product control into two independent clamps: a rotating clamp for controlling sewing direction and a moving clamp for positioning. This segmentation allows each clamp to perform its specific function with simpler mechanics, reducing overall system complexity and cost compared to a single manipulator arm with three rotation axes.
2Manufacturing precision
If the sewing product is moved rapidly over very small distances during sewing operation, then sewing precision is improved, but the complexity and cost of the movement control system increases
Solution Approach 1:
The patent employs dynamic control through the rotating clamp, which can rapidly rotate to adjust sewing direction as needed during the sewing operation. This dynamic adjustment capability allows the system to maintain high sewing precision without requiring complex movement control mechanisms, as the rotation provides flexible real-time direction changes.
Solution Approach 2:
The patent utilizes periodic intermittent movement and rotation of the sewing product through the clamps. The rotating clamp performs periodic rotation to position the sewing product for the next stitch, enabling precise sewing control through simple periodic actions rather than continuous complex control.
3Manufacturing precision
If a positioning device using synchronous rotation of lever and thread shaft is used, then sewing direction control is improved, but applicability to different sewing machine types decreases
Solution Approach 1:
The patent designs the rotating clamp and moving clamp system to be universally applicable to different types of sewing machines, including cylinder bed heads. The clamps can be mounted on various sewing machine platforms and perform both positioning and rotation functions, making the system versatile across different machine types without requiring machine-specific positioning devices.
Data Source
AI summary
A sewing direction control apparatus for sewing machine, comprising: a base plate, a circular ring-shaped transmission element dispose on the base plate and a driving element with a driving unit. During sewing, the driving unit drives the transmission element, rotating a sewing product placed at the center of the transmission element with the driving element, thereby controlling the sewing direction of the sewing product, and thus improving the sewing accuracy. The direction control apparatus has low cost, and is suitable for various types of automatic sewing machines.