Winding Turret Speed Control for Strand Material
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Solution Overview
Problem
The existing method for continuous winding of spool material results in uneven layers due to evasive movement of the winding spindle during the changing phase, leading to loose layers on the coil circumference, as the dancer arm's slack is influenced by spindle speed, bobbin diameter, and evasive movement, causing inconsistent winding speed.
Innovation Solution
Incorporating the turret drive into the speed control of the dancer arm device, allowing for control of the rotational movement and speed of the winding turret to compensate for sagging, and setting a fixed alternating spindle speed during changes to maintain uniform material take-up, with the turret's rotational speed adjusted between 160° to 200° for continuous movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the winding spindle is moved between operating position and changing position, then the bobbin can be changed continuously, but the evasive movement causes the material to be wound at too low speed resulting in loose layers
Solution Approach 1:
The patent applies dynamics by making the winding spindle movable between operating position and changing position, allowing continuous bobbin replacement. The spindle dynamically transitions between positions while maintaining winding operation, resolving the contradiction between continuous productivity and layer precision.
Solution Approach 2:
The patent uses preliminary action by pre-positioning the dancer arm device to compensate for evasive movement before it occurs. The dancer arm anticipates the spindle's position change and adjusts the material loop slack accordingly, ensuring consistent winding speed and layer tightness throughout the transition.
2Manufacturing precision
If the spindle speed is increased to compensate for evasive movement, then layer tightness is maintained, but the material take-up from upstream process becomes non-uniform
Solution Approach 1:
The patent implements feedback through the dancer arm device that continuously monitors material loop slack and provides real-time information about material take-up conditions. This feedback mechanism allows the system to maintain uniform material flow from the upstream process while compensating for evasive movement effects.
Solution Approach 2:
The dancer arm device serves as an intermediary between the upstream material supply and the winding spindle. It mediates the material flow, absorbing variations in take-up speed and ensuring uniform material supply to the winding zone regardless of spindle position changes.
3Manufacturing precision
If the dancer arm slack is adjusted for evasive movement, then layer consistency is improved, but the complexity of speed control increases
Solution Approach 1:
The patent applies universality by designing the dancer arm device to perform multiple functions simultaneously: it maintains material loop slack, compensates for evasive movement, and provides feedback for speed control. This multi-functionality reduces the need for separate control mechanisms, managing system complexity while achieving layer consistency.
Data Source
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AI summary
The invention relates to a method and to a device for continuously winding a strand-shaped winding material (34) into spools (6). The spools (6) are alternately wound on two winding spindles (3.1, 3.2) retained on a winding revolver (2), wherein the winding spindles (3.1, 3.2) are driven by two separate spindle drives (19.1, 19.2). In order to maintain a constant winding speed during the winding of the spools, a movable jockey arm (14) of a jockey arm apparatus (13) is provided, which jockey arm produces a loop having a slack (35) on the fed winding material (34). The slack of the loop of the winding material is used to control a spindle rotational speed of one of the winding spindles. The winding spindles are arranged on a winding revolver that, by means of a rotational motion, guides the winding spindles alternately between a changing position and an operating position for transferring the winding material. According to the invention, in order to ensure an even acceptance of the fed winding material during a changing phase, a rotational motion or a rotational speed of the winding revolver is controlled according to the slack of the loop of the winding material. For that purpose, the revolver drive (21) of the winding revolver (2) is coupled to a rotational-speed control unit (17) of the jockey arm apparatus (13).