Cutting Insert Through-Hole Density Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The manufacturing of tangential cutting inserts with non-parallel through-holes faces challenges in achieving dimensional accuracy due to uneven density distribution, which leads to deformation during sintering, and existing methods are either complex or fail to provide high accuracy.
Innovation Solution
A method involving a press tool with a core rod inserted non-parallel to the pressing axis, where the core rod is turned in alternating directions during compaction to achieve even density distribution around the through-hole, minimizing deformation and increasing the strength of the cutting inserts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a core rod is inserted non-parallel to the pressing axis to form a through-hole, then the cutting insert can be attached to a tool holder, but the density distribution around the through-hole becomes uneven causing deformation during sintering
Solution Approach 1:
The core rod is made rotatable during the compaction process. By rotating the core rod in alternating directions, the powder distribution around the through-hole becomes more uniform, preventing density variations that would cause deformation during sintering. This dynamic adjustment resolves the contradiction by maintaining manufacturing simplicity while achieving high dimensional accuracy.
Solution Approach 2:
The core rod undergoes periodic rotation in alternating directions during compaction. This periodic motion ensures uniform powder packing around the through-hole by continuously redistributing the material, thereby achieving even density distribution and preventing deformation during subsequent sintering while maintaining ease of manufacture.
2Device complexity
If the core rod is kept stationary during compaction, then the manufacturing process is simple, but the density distribution around the through-hole is uneven
Solution Approach 1:
The core rod is transformed from a stationary component to a dynamic one that can rotate during compaction. This rotation creates more uniform density distribution around the through-hole by preventing powder accumulation on one side, thereby improving compositional stability without significantly increasing device complexity.
Solution Approach 2:
The core rod serves dual functions: it defines the through-hole geometry and simultaneously distributes powder evenly through its rotation. This self-service approach improves density uniformity while avoiding the need for additional complex powder distribution mechanisms.
3Manufacturing precision
If the core rod is rotated during compaction, then the density distribution becomes even, but the manufacturing process becomes more complex
Solution Approach 1:
The core rod is designed with rotational capability that can be actuated during compaction. This dynamic feature achieves uniform density distribution while keeping the equipment design relatively simple, as the rotation mechanism can be integrated into the existing press tool without requiring entirely new equipment.
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
This method results in cutting inserts with improved dimensional accuracy and reduced porosity, leading to stronger and longer-lasting tools with minimized deformation of the through-hole during sintering.
Implementation Method 1
During at least a portion of the compaction step, the core rod is turned a predetermined angle in alternating direction around its longitudinal axis
Implementation Method 2
sintering the cutting insert green body
Data Source
Figure 1
Figure 2a~2b
Figure 3a
AI summary
A method for manufacturing a cutting insert (1) having a through-hole (9) which extends in a direction which is non-parallel to the main pressing direction, comprising the steps of: - moving first and second punches (13, 14) within a die cavity (12) toward each other along a first pressing axis (A) to compact a powder around a core rod (15) into a cutting insert green body; wherein, during at least a portion of the compaction step, the core rod (15) is turned a predetermined angle in alternating direction around its longitudinal axis (B).