Sawchain Drive Link Layout for Higher Sheet Metal Yield
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Solution Overview
Problem
Existing drive links for sawchains have large surface dimensions, leading to low yield per sheet metal strip and high production costs in the manufacturing process.
Innovation Solution
The drive link design features a point-symmetric functional surface and contact surface configuration, allowing two drive links to be arranged compactly with one cut, reducing waste and increasing yield per sheet metal strip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If drive links are designed with large surface dimensions to ensure structural integrity and functionality, then the mechanical strength and functional performance are improved, but the yield per sheet metal strip decreases and production costs increase
Solution Approach 1:
The drive link is divided into two separate components: a body portion and a apex portion. This segmentation allows the components to be arranged in different configurations on the sheet metal strip, optimizing space utilization and increasing yield while maintaining the structural integrity of each component.
Solution Approach 2:
The apex portion is designed to extend in a direction transverse to the drive link plane, utilizing the third dimension (height/depth) rather than only the planar dimensions. This dimensional transition allows compact arrangement of multiple drive links on the sheet metal strip, increasing yield without compromising the functional surface area of the apex.
2Manufacturing precision
If drive links are punched with sufficient spacing between contours to provide material web resistance during cutting, then manufacturing precision is improved, but the yield per sheet metal strip decreases
Solution Approach 1:
By segmenting the drive link into body and apex portions, the punching process can be optimized for each component separately. The body portions can be arranged with adequate spacing for accurate punching, while the apex portions can be positioned to utilize the material web between body contours, achieving both cut accuracy and high yield.
Solution Approach 2:
The apex portion extends transverse to the drive link plane, allowing it to be positioned in the third dimension rather than only in the planar direction. This enables the apex to utilize the material web between body contours without compromising the spacing needed for accurate punching of the body portions.
3Productivity
If multiple drive links are arranged compactly on the sheet metal strip to increase yield, then productivity is improved, but maintaining manufacturing tolerances becomes more difficult
Solution Approach 1:
Segmenting the drive link into body and apex portions allows for modular arrangement on the sheet metal strip. Each segment can be punched with standard tolerances, and the overall assembly achieves high yield through efficient spatial arrangement rather than through tight tolerances on a single large component.
Solution Approach 2:
By positioning the apex portion in the transverse dimension rather than in the planar direction, the design allows compact arrangement of multiple drive links without requiring tight planar tolerances. The apex extends perpendicular to the drive link plane, utilizing the third dimension to achieve compactness while maintaining manufacturing tolerances.
Data Source
AI summary
A drive link for a sawchain is disclosed wherein the drive link has a top side which faces away from an opening plane defined by the respective axes of the rivet openings and extends at least partially at the drive link apex. A functional surface and a contact surface spaced apart from the functional surface are provided on the top side of the drive link. The functional surface is formed on the drive link apex and includes a section of the top side in which the top side is at a maximum spacing from the opening plane. The functional surface of the top side of the drive link is point-symmetric to a symmetry point with respect to the contact surface in the viewing direction toward the drive link plane.