Nibbler Chip Collection Attachment for Smaller Start Holes
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Solution Overview
Problem
Existing nibblers require large machining start holes due to the oversized chip collection attachments, necessitating the use of cumbersome large hole saws, which compromises user convenience.
Innovation Solution
A chip collection attachment with a mounting part and receptacle part that matches or slightly exceeds the outer diameter of the die holder, allowing for a smaller machining start hole and simplified attachment mechanism using existing nibbler structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a chip collection attachment with large outer diameter is used, then chips can be collected effectively, but a large machining start hole is required which reduces convenience
Solution Approach 1:
The mounting part is designed with a telescopic structure that allows it to be inserted into the die holder's through-hole. The mounting part's outer diameter is larger than the through-hole when extended for chip collection, but can be retracted into the through-hole when not in use, eliminating the need for large machining start holes while maintaining effective chip collection capability.
2Object-generated harmful factors
If a chip collection attachment with large outer diameter is used, then chips can be collected effectively, but the attachment structure becomes more complex
Solution Approach 1:
The mounting part is designed with a telescopic structure that allows it to be inserted into the die holder's through-hole. The mounting part's outer diameter is larger than the through-hole when extended for chip collection, but can be retracted into the through-hole when not in use, eliminating the need for large machining start holes while maintaining effective chip collection capability.
Data Source
AI summary
A nibbler (10) includes: an elongated punch (30) that reciprocates in an axial direction; a die (50) having a first through-hole (51) into which a tip of the punch is insertable; a die holder (40) having a recess (42) in which the die is housed, a tip portion (43) located farther from the punch in the axial direction than the recess, and a second through-hole (41) that communicates with the first through-hole; and a chip collection attachment (100). The chip collection attachment includes a tubular mounting part (100) that is removably attached to the tip portion, and a bottomed tubular receptacle part (120) that stores chips guided through the first and second through-holes, and the interior of the mounting part. The outer diameters of the mounting part and of the receptacle part are substantially the same as or less than the outer diameter of the tip portion.