Exchangeable Core Drill Section With Magnetic Pin Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drill bits with replaceable cutting sections require a heat source or soldering device for quick replacement, which is inconvenient and can damage the connection between cutting segments and the ring section, leading to increased material costs and risk of impaired segment alignment.
Innovation Solution
A drill bit design featuring a magnetic pin connection between the cutting section and the drill shank section, allowing for easy detachment and reattachment without the need for soldering, using permanent magnet pin elements that secure the sections and facilitate quick exchange without precise alignment requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a combined plug and solder connection is used to connect the cutting section and drill shank section, then the connection strength and reliability are improved, but the ease of replacement deteriorates because a heat source or soldering device is required for destruction and creation of soldered connections
Solution Approach 1:
The connection system is segmented into two independent connection mechanisms: a plug connection for primary positioning and support, and a solder connection for additional strengthening. This segmentation allows the plug connection to provide immediate mechanical support while the solder connection enhances reliability, yet the plug connection can function independently to enable easier replacement if needed.
Solution Approach 2:
The patent combines two connection methods (plug connection and solder connection) into a hybrid system. The plug connection elements provide immediate mechanical support and alignment, while the solder connection adds thermal and mechanical bonding for enhanced reliability. This merging allows the system to benefit from both connection types simultaneously.
2Reliability
If a solder connection is used to connect the cutting section and drill shank section, then the connection strength is improved, but the risk of damaging cutting segments increases because heat can release the soldered connection of cutting segments to the ring section
Solution Approach 1:
The connection system is divided into two independent parts: the plug connection that provides immediate mechanical support without heat, and the solder connection that provides additional bonding strength. This segmentation allows the plug connection to bear the mechanical load during replacement operations, reducing the frequency and intensity of soldering operations and thus minimizing heat exposure to cutting segments.
Solution Approach 2:
The plug connection is established first before soldering, providing preliminary mechanical support and alignment. This preliminary action ensures that the cutting section is securely held in position before the soldering process begins, reducing the need for repositioning and repeated soldering operations that would expose cutting segments to harmful heat.
3Object-affected harmful factors
If the ring section is made taller to protect cutting segments from heat, then the cutting segments are protected from heat damage, but the material cost increases and the ring section should be as narrow as possible to reduce cost
Solution Approach 1:
The protective function is segmented between the ring section and the plug connection elements. Instead of relying solely on the ring section height for thermal protection, the plug connection elements are positioned to provide mechanical support and heat isolation. This segmentation allows the ring section to maintain its cost-effective dimensions while still providing adequate protection through the combined system.
Solution Approach 2:
The plug connection elements act as intermediary components between the heat source and the cutting segments. These elements provide thermal barrier functionality, reducing heat transfer to the cutting segments without requiring an increased ring section height. This intermediary role allows the ring section to remain compact and cost-effective while still achieving heat protection goals.
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
Enables quick and easy replacement of cutting sections with reduced equipment outlay and minimizes the risk of damaging connections, while maintaining precise alignment and functionality during drilling operations.
Implementation Method 1
The pin connection is designed as a magnetic pin connection, with the pin element or one of the plug-in connection elements being designed as a permanent magnet
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
Drill bit (1), which is rotatable about a drilling axis (9), having a cutting portion with one or more cutting segments (6) and a first plug-in connecting element (13), and a drill shank portion (3) with a second plug-in connecting element (14), which forms a plug-in connection with the first plug-in connecting element (13), wherein the first plug-in connecting element (13) and the second plug-in connecting element (14) can be connected by means of a pin connection (22).