Flat Drill-Tip Screw for Fast Wood Drilling Without Splitting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional screws used for drilling into hard wood often experience splitting or crashing due to inadequate space for debris ejection, leading to compression and potential damage during the drilling process.
Innovation Solution
A screw design featuring a flat drilling end with a cylindrical body and a longitudinally extended flat drill portion, where the maximum thickness of the transversal cross-section is less than half of the maximum width, and the width is smaller than the outer diameter of the thread, with two opposite lateral sides forming sharp knife blades to facilitate debris removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional screw designs are used, then drilling speed and debris ejection are emphasized, but split prevention deteriorates due to inadequate space for receiving and ejecting debris
Solution Approach 1:
The screw tip is designed with a flat drilling end featuring a transversal cross-section with specific width and thickness dimensions, creating a planar debris receiving chamber at the tip. This dimensional configuration provides adequate space for receiving and ejecting debris laterally, preventing compression and split while maintaining drilling efficiency
2Ease of operation
If conventional screw designs are used, then drilling function is provided, but debris ejection space is insufficient leading to compression and crash
Solution Approach 1:
The flat drilling end with its specific width-thickness ratio is pre-formed at the screw tip to create adequate debris receiving space before drilling begins. This preliminary structural configuration ensures that debris has sufficient space to be received and ejected during the drilling process, preventing compression and crash
Data Source
AI summary
A screw with a flat drilling end comprises a cylinder (1) with a thread (11) wrapped around and a flat drill portion (2) longitudinally extended from a distal end of the cylinder (1); a maximum thickness (T) of a transversal cross section of the flat drill portion (2) being less than a half of the maximum width (D) of the transversal cross section of the flat drill portion (2); the maximum width (D) of the transversal cross section of the flat drill portion (2) being smaller than an outer diameter of the thread (11) of the cylinder (1); the width and thickness of the transversal cross section of the flat dill portion (2) being reduced to a point tip end of the flat drill portion (2). Two opposite lateral sides form as sharp knife blades.