Chainsaw Guide Bar Lamination With Removable Alignment Plate
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Solution Overview
Problem
Existing laminated guide bars for chainsaws are heavy and prone to alignment errors during assembly, which affects their performance and appearance.
Innovation Solution
A method for producing a guide bar with a core plate and side plates, featuring alignment apertures for precise alignment and a removable alignment plate, allowing for reduced weight and improved assembly accuracy, along with a nose sprocket arrangement integrated into the guide bar structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an alignment aperture is provided in the core plate close to the middle, then alignment during lamination is facilitated, but the guide bar weight increases and debris can enter the aperture during operation
Solution Approach 1:
The core plate is segmented into two functional parts: a permanent core plate providing structural support and a removable alignment plate providing the alignment aperture only during manufacturing. This segmentation allows the alignment aperture to exist temporarily for precise assembly without permanently increasing guide bar weight or creating a debris entry point during operation.
Solution Approach 2:
The alignment plate is attached to the core plate before the lamination process to establish precise alignment of the aperture with the side plates. This preliminary alignment action ensures manufacturing precision is achieved during assembly, and the alignment plate is then removed so the aperture does not remain as a permanent weight addition or debris pathway.
2Strength
If the alignment aperture is surrounded by material in the core plate, then structural integrity is maintained, but weight reduction is limited
Solution Approach 1:
The alignment function is segmented from the structural core plate and placed in a separate removable alignment plate. This allows the core plate to be optimized for strength without the weight penalty of a permanent aperture, while the alignment plate provides the necessary alignment feature only during manufacturing.
Solution Approach 2:
The alignment aperture function is extracted from the permanent core plate structure and placed in a temporary alignment plate. This extraction allows the core plate to maintain full structural integrity and strength without the compromise of a permanent opening, while still enabling precise alignment during assembly through the removable plate.
3Manufacturing precision
If alignment apertures are provided in both side plates and core plate, then alignment accuracy is improved, but the number of components and assembly complexity increases
Solution Approach 1:
The removable alignment plate acts as an intermediary component that temporarily connects the core plate and side plates during alignment. It provides a common reference feature (the aperture) that facilitates precise alignment of all three components simultaneously, then is removed after serving its mediating function, avoiding permanent complexity.
4Weight of moving object
If a removable alignment plate is used, then weight is reduced and debris entry is minimized, but the manufacturing process becomes more complex
Solution Approach 1:
The alignment plate is attached to the core plate before lamination to establish precise alignment. This preliminary action simplifies the lamination process by providing built-in alignment features, and the plate is removed after serving its purpose, achieving weight reduction without significantly complicating the overall manufacturing flow.
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
The method results in a lighter guide bar with reduced alignment errors, enhancing performance and appearance, while maintaining structural integrity and enabling space for advertising or data display.
Implementation Method 1
Aligning the core plate to the side plates, such that the alignment aperture of the alignment plate is in register with the alignment aperture of the at least one side plate
Implementation Method 2
The three plates may be attached to each other by welding, normally spot welding or pressure welding
Data Source
AI summary
The present disclosure related to a method (100) for production of a chainsaw guide bar (5). The method (100) comprises the steps of providing (120) two elongated side plates (23a, 23b), wherein at least one of the side plates (23a, 23b) is provided with an alignment aperture (31b). Providing (140) a core plate (25) which is connected to an alignment plate (33) comprising an alignment aperture (31a). Positioning (160) a side plate (23a, 23b) on each side of the core plate ((25). Aligning (180) the core plate (25) to the side plates (23a, 23b) such that the alignment aperture (31a) of the core plate (25) is in register with the alignment aperture (31b) of the at least one side plate (23a, 23b). Joining (200) the core plate (25) and the side plates (23a, 23b) to form an elongated guide bar (5) and removing (200) the alignment plate (33) from the core plate (25). The disclosure also relates to a guide bar (5) for a chainsaw (1). The guide bar (5) is produced according to the method (100). The disclosure also relates to a guide bar blank.