PRODUCT
Technology of powder metallurgy parts structure
by:Waxing
2020-09-16
Powder metallurgy material forming method is commonly used in rigid closed mold, metal powder compression forming, mould cost is higher;
Because powder liquidity is poorer, and is under the influence of friction, compact density, uneven distribution of generally low and strength is not high, thin, long and thin shape and the pressing direction and variable cross-section of the products is difficult to take shape.
Therefore, adopting the press forming parts of the structure of the design should pay attention to the following questions.
(1) as far as possible simple, symmetrical shape, change to avoid cross section and narrow slot, spherical, etc. , for the moulding and compaction, as shown in figure 7.
3.
1.
2 to avoid local thin wall to fit powder compaction and prevent crack.
(3) avoid grooves on the side and concave hole, facilitate compaction or reduce the residual block.
(4) to avoid the pressing direction cross-sectional area, to facilitate the compaction.
The wall of the junction should use rounded corners or transition chamfering, avoid sharp corners, to facilitate compaction and prevent mold or compact to produce stress concentration.
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