Wire Section Holding Mechanism for Surgical Clamp Production
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Solution Overview
Problem
Existing devices for producing surgical clips from wire sections face issues with dimensional inaccuracies and excessive scrap material due to wire shifting or twisting during the bending and cutting process.
Innovation Solution
A device with a holding mechanism that grips the wire section between two cutting punches, ensuring precise cutting and bending without material loss, utilizing a bending device with adjustable pressure rollers and an anvil to form clips with repeat accuracy of 1/100 millimeter, and a feed system with straightening rollers to align the wire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the wire section is held in a clamped manner during bending, then position shifts are reduced, but the free ends must be shortened resulting in large scrap material
Solution Approach 1:
The holding device grips the wire section at the cutting location before the cut is made. This preliminary positioning ensures the wire section is accurately located at the bending position from the start, eliminating the need for subsequent shortening operations and preventing material waste while maintaining manufacturing precision.
Solution Approach 2:
The holding device is integrated into the cutting device, allowing the wire section to be gripped and held at the exact cutting location. This extraction of the holding function from a separate clamping mechanism enables precise positioning without requiring additional material removal or shortening operations.
2Productivity
If the wire section is cut off from a longer piece of wire, then continuous wire feeding is achieved, but position shifts and twisting occur during cutting
Solution Approach 1:
The holding device grips the wire section at the cutting location before the cut is made. This preliminary positioning ensures the wire section is accurately located at the bending position from the start, eliminating position shifts during the cutting operation while maintaining continuous wire feeding capability.
Solution Approach 2:
The holding device acts as an intermediary between the cutting punches and the wire section. It provides a stable reference point that prevents twisting and position shifts during cutting, ensuring manufacturing precision is maintained even as wire sections are continuously cut and fed through the system.
3Manufacturing precision
If the wire section is held permanently during cutting and bending, then repeat accuracy of 1/100 millimeter is achieved, but device complexity increases
Solution Approach 1:
The holding device is merged with the cutting device, allowing the same mechanism to perform both holding and cutting functions. This integration reduces overall device complexity while achieving repeat accuracy of 1/100 millimeter through permanent holding during cutting and bending operations.
Solution Approach 2:
The holding device serves multiple functions: it grips the wire section before cutting, holds it during cutting, positions it for bending, and maintains holding until the bent clip is fed to the insertion device. This multi-functionality reduces the need for separate mechanisms while achieving high repeat accuracy.
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 solution achieves precise cutting and bending with minimal scrap material, ensuring repeat accuracy and preventing wire twisting, thereby reducing production tolerances and material waste.
Implementation Method 1
By acting on the free ends of the wire section that protrude on both sides, these are bent over by the pressure rollers and pressed against the longitudinal sides of the anvil.
Implementation Method 2
the holding device is designed in the manner of tongs and has a holding area that can be brought from a holding position into an open position against a restoring force
Implementation Method 3
these are bent over by the pressure rollers and pressed against the longitudinal sides of the anvil
Data Source
Figure 1~3
Figure 4~5
Figure 6~9
AI summary
The invention relates to a device (1) for producing clamps (3) bent from wire sections (2), in particular surgical clamps, having a bending device (22) for bending a wire section (2), having a feed device (4) for a wire (5) having a cutting device (6) for separating a wire section (2) from the fed wire (5). The cutting device (6) has two cutting stamps (11) for cutting the wire (5). A holding device (14) is provided for gripping and holding the wire section (2) between the two cutting stamps (11) before separating the wire section (2) and for positioning the separated wire section (2) on a bending device (22) and for feeding the wire section (2) bent into the clamp to a device (33) for inserting the clamp (3) into a cartridge (34) or a clamp storage (35).