鑄鐵檢測基礎平板制作過(guò)程中的物理性能
時(shí)間：2016/1/26 8:51:45
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鑄鐵檢測刮研平板（刮研平臺）在使用時(shí)要先進(jìn)行安裝調試，常用調整墊鐵調節水平，購買(mǎi)本廠(chǎng)鑄鐵刮研平板附贈相應規格調整墊鐵，首先把檢驗平臺的工作面清理干凈，在確認沒(méi)有問(wèn)題的情況下使用，使用過(guò)程中，要注意避免工件和平板的工作面有過(guò)激的碰撞，防止損壞檢驗平板（檢驗平臺）的工作面；工件的重量不能超過(guò)檢驗平臺的額定載荷，否則會(huì )造成工作質(zhì)量降低，損壞平板的結構，甚至會(huì )造成平板變形，使之無(wú)法使用。鑄鐵檢測刮研平板的鑄造應力、變形和開(kāi)裂及其防止。
鑄造應力的形成：鑄鐵件再凝固后冷卻過(guò)程中，溫度將繼續下降而產(chǎn)生收縮，如收縮收到阻礙，便會(huì )在鑄件中產(chǎn)生鑄造應力。
鑄造應力按其形成原因可分為熱應力、相變應力和機械阻礙力3種。
熱應力：由于鑄鐵件的各部分在冷卻過(guò)程中的冷卻速度不同，造成各部分的收縮量不同，單鑄件各部分聯(lián)為一個(gè)整體，彼此間互相制約而產(chǎn)生應力。鑄鐵檢驗刮研平板這種由于線(xiàn)收縮受熱阻礙而產(chǎn)生的熱應力一般成為鑄件內的殘留應力，其大小與鑄件厚壁部分由塑性狀態(tài)變?yōu)閺椥誀顟B(tài)時(shí)厚薄兩部分的溫度差成正比，即鑄件的壁厚差愈大，殘留熱應力也愈大。凡能促使鑄件同事凝固及冷卻速度的因素，都能減小鑄件中的殘留熱應力。
Physical Properties of Cast Iron Testing
Foundation Plate in Manufacturing Process
Cast iron scraping and grinding flat plate
(scraping and grinding platform) should be installed and debugged before use.
Regulating level of pad iron should be adjusted in common use. Buying our cast
iron scraping and grinding flat plate with corresponding specifications to
adjust pad iron. First of all, clean the working face of the inspection
platform, use it when there is no problem, and pay attention to avoiding during
use. No excessive collision between the workpiece and the working face of the
flat plate can prevent damage to the working face of the inspection flat plate
(inspection platform); the weight of the workpiece can not exceed the rated
load of the inspection platform, otherwise, the working quality will be
reduced, the structure of the flat plate will be damaged, and even the flat
plate will be deformed, making it unusable. Cast iron detects casting stress,
deformation and cracking of scraping and lapping plate and prevents them.
Foundry stress formation: During the
cooling process of cast iron after solidification, the temperature will
continue to decrease and shrinkage will occur. If the shrinkage is hindered,
the casting stress will occur in the casting.
Casting stress can be divided into thermal
stress, phase change stress and mechanical hindrance force according to its
causes.
Thermal stress: Because of the different
cooling speed of each part of the cast iron in the cooling process, the
shrinkage of each part is different. Each part of the single casting is united
as a whole, which restricts each other and produces stress. The thermal stress
of scraping and lapping slab in cast iron inspection is usually the residual
stress in the castings, which is proportional to the temperature difference
between the thick and thin parts when the thick wall part of the castings
changes from plastic state to elastic state. That is to say, the bigger the
wall thickness difference of the castings is, the bigger the residual thermal
stress is. The residual thermal stress in the castings can be reduced by all
factors that can promote the solidification and cooling rate of the castings
colleagues.
Company name: botou zhuoyuan mechanical equipment manufacturing co.,LTD
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address: jiaohe development zone, botou city, hebei province
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