Press Tool Core Rods for Cutting Insert Burr Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing press tools for forming cutting insert green bodies with through holes often leave burr rings at the contact points of the core rods, which can form sharp edges that damage fastening screws during the manufacturing process.
Innovation Solution
A press tool design featuring movable core rods with a piston mechanism that allows for the removal or reduction of burr rings by retracting the core rods and moving the piston over the interfaces to scrape off the burr rings, ensuring the cutting insert green body is free from these imperfections before removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If core rods are used to form through holes in green bodies, then through holes can be created, but burr rings are formed at the contact surfaces of the core rods
Solution Approach 1:
The core rod is divided into two separate segments (first core rod and second core rod) that move independently. This segmentation allows each segment to be controlled separately, enabling the removal of burr rings formed at their contact surfaces without affecting the through hole formation. The two segments can be retracted to different positions to access and remove burrs while maintaining the integrity of the through hole.
Solution Approach 2:
The invention performs preliminary removal of burr rings immediately after green body formation while the core rods are still in position. By retracting the core rods to release positions and using removal tools to eliminate burrs before ejecting the green body, the harmful burr rings are addressed in advance, preventing potential damage to fastening screws during subsequent assembly operations.
2Manufacturing precision
If core rods remain in contact during compression, then through holes are formed, but burr rings are created that may damage fastening screws
Solution Approach 1:
The core rods are designed with dynamic movement capabilities, allowing them to transition between press positions (for through hole formation) and release positions (for burr removal). This dynamic positioning enables the system to optimize for through hole dimensional accuracy during compression, then switch to a configuration that facilitates burr ring removal, eliminating sharp edges that could damage fastening screws.
Solution Approach 2:
The invention extracts the harmful burr rings from the through hole surfaces by retracting the core rods to release positions where the burrs can be accessed and removed. This separation of the core rod contact surfaces from the green body allows for the extraction of burr material without compromising the previously formed through hole dimensions.
3Device complexity
If a simple press tool is used, then the device complexity is low, but burr rings cannot be removed
Solution Approach 1:
The press tool employs segmented core rods that can move independently relative to each other and to the green body. This segmentation, combined with the ability to retract core rods to release positions, provides a relatively simple mechanism for burr removal compared to more complex automated systems. The segmented design allows burr removal functionality to be added without significantly increasing overall device complexity.
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 effectively reduces or removes burr rings, preventing damage to fastening screws and ensuring a smoother manufacturing process, allowing for the production of high-quality cutting inserts that can be further treated for machining applications.
Implementation Method 1
operating the cavity to compress the powder in the compression space to form the cutting insert green body
Data Source
AI summary
A press tool and a method for forming a cutting insert green body. The press tool includes a first and a second core rod. Both core rods are movably arranged along an axis. When both core rods are in a press position, their respective contact surfaces contact each other and when both the first and second core rods are in a release position, their respective contact surfaces are separated. The first core rod includes a base body having a forwardly facing abutment surface and a piston having a shaft and a head. The piston is movable to a plurality of extended positions and to a retracted position, in which the abutment surface of the head abuts against the abutment surface of the base body. When both the first core rod and the second core rod are in their respective press positions, the piston is in the retracted position.