机床铸件在凝固以后的继续冷却过程中,其固态收缩受到阻碍,机床铸件内部即将产生内应力. 机床铸件合金的线收缩受到铸型,型芯,浇冒系统的机械阻碍而形成的内应力. 机械内应力是暂时应力.热应力是由于机床铸件壁厚不均匀,各部分冷却速度不同,以致于在同一时期内机床铸件各部分收缩不一致而引起的内应力. 

    机床铸件的结构圆角。避免锐角连接， 厚壁与薄壁间的联接要逐步过渡。减缓筋,辐收缩的阻碍；起模方便和减少分型面数量，避免大平面结构，分型面应尽量为平直面;凸面,筋条的设计应便于起模。应尽量减少型芯的数量,避免不必要的型芯，便于型芯的固定、排气和清理.。机床铸件的结构要保证质量,简化工艺。机床铸件的结构不能轻易修改,，如需修改应向产品设计者说明。

After the solidification of the casting machine to continue the coolingprocess, hampered by its solid-state contraction, the casting machine will

produce in the internalStress machine by casting alloy linear shrinkage mold, core, pouring risk ofmechanical obstruction and the formation of the system of internal stress.MechanicalStress is a temporary stress heat stress is due to machine castings uneventhickness, cooling rate of different parts, so that in the sameTemporary contraction of the various parts of the casting machine during theinconsistencies caused by stress.
Structure of the casting machine rounded. Avoid the acute angle connection,thick-walled and thin-walled connection to a gradual transition between. Slowmuscle, spoke closeReduced barriers; from the model to facilitate and reduce the number of sub-surface, to avoid large flat structure, sub-surface should be as flat face;convex, Ribs should be easy since the design mode. Should minimize the number ofcores, to avoid unnecessary core, to facilitate the fixed core, Exhaust and clean.
Structure of the casting machine to ensure quality, simplify the process.Structure of the casting machine can not be easily modified, for modificationshould beProduct designers instructions.

• 机床铸件的冲砂缺陷
• 灰铁铸件化学粘砂缺
• 床身铸件怎样选择合
• 离心球墨床身铸件在
• 机床铸件常见缺陷分
• 熔模床身铸件的特点
• 灰铁铸件生产条件以
• 警惕机床铸件发黑
• 床身铸件凝固末期的
• 消除机床铸件的内应