Technical requirements of

　　Inspection surface Plate:

　　The working surface, when

　　inspected visually, shall be free from blowholes, sand holes, cracks, slag

　　inclusions scratches, porous patches and other visual flaws.

　　The working surface shall be

　　clean and uniform and the other sides shall be painted well.

　　The plugging of blowholes or

　　porous patches in the working surface with material of a similar composition is

　　permitted provided that such a repair does not affect stability or accuracy.

　　The raw material of Cast Iron

　　Surface Plate shall be the close-grained cast iron whose hardness is of HB

　　170~220.

　　Where tapped holes or inserts

　　are required the necessary work shall be carried out before the working surface

　　is finished.

　　四、檢驗(yàn)平臺的維修保養(yǎng):

　　1、為了防止檢驗(yàn)平臺發(fā)生變形,在吊裝檢驗(yàn)平臺時(shí),要用四根同樣長度的鋼絲繩同時(shí)掛住檢驗(yàn)平臺上得四個(gè)起重孔,將檢驗(yàn)平臺平穩(wěn)吊裝在運(yùn)輸工具上。檢驗(yàn)平臺不可以堆疊存放,防止因?yàn)槎询B擠壓造成檢驗(yàn)平臺變形2、將檢驗(yàn)平臺支承點(diǎn)墊好、墊平,保證每個(gè)支撐點(diǎn)受力均勻,保證整個(gè)檢驗(yàn)平臺平穩(wěn)。3、檢驗(yàn)平臺安裝時(shí)將檢驗(yàn)平臺的各個(gè)支撐點(diǎn)用調(diào)整墊鐵墊好、墊實(shí),由專業(yè)技術(shù)人員將檢驗(yàn)平臺調(diào)整至合格精度。4、使用檢驗(yàn)平臺時(shí),安裝機(jī)械設(shè)備零件時(shí),不要在檢驗(yàn)平臺上安裝,更不可以使用榔頭、鉗子等工具敲打檢驗(yàn)平臺。安放機(jī)械設(shè)備零件應(yīng)該輕拿輕放,防止機(jī)械設(shè)備零件和檢驗(yàn)平臺強(qiáng)烈碰撞。如果檢驗(yàn)平臺表面和機(jī)械零件發(fā)生碰撞,應(yīng)把收到撞擊凹陷或凸起的部分修復(fù)好后再繼續(xù)使用;不要在檢驗(yàn)平臺上挪動比較粗糙的工件,以免對檢驗(yàn)平臺工作面造成磕碰、劃傷等損壞;5、為了防止檢驗(yàn)平臺整體變形,使用完畢后,要將工件從檢驗(yàn)平臺上拿下來,避免工件長時(shí)間對檢驗(yàn)平臺重壓造成檢驗(yàn)平臺的變形。6、檢驗(yàn)平臺不用時(shí)要及時(shí)將工作面洗凈,然后涂上一層防銹油,并用防銹紙蓋上,用檢驗(yàn)平臺的外包裝將檢驗(yàn)平臺蓋好,以防止平時(shí)不注意造成對檢驗(yàn)平臺工作面的損傷。7、檢驗(yàn)平臺應(yīng)安裝在通風(fēng)、干燥的環(huán)境中,并遠(yuǎn)離熱源、有腐蝕的氣體、有腐蝕的液體。8、檢驗(yàn)平臺按國家標(biāo)準(zhǔn)實(shí)行定期周檢,檢定周期根據(jù)具體情況可為6-12個(gè)月。

　　Maintenance of Inspection

　　Surface Plate:

　　1. A surface plate is a a

　　surface plate is a datum and should be protected against damage. The top should

　　be frequently wiped clean from dust and other particles. When measurements are

　　being made, a cloth should be spread on the surface plate on which small tools

　　and gauges can be placed when not in use. When the surface plate is not in use

　　the top should always be kept covered.

　　2. The plate should be in a

　　location away from direct sunlight and sources of draughts which could cause a

　　vertical gradient of temperature such that the top and underside of the surface

　　plate are at different temperatures.

　　3. Stands should be located

　　on a stable foundation. the surface plate should be supported firmly and

　　levelled.

　　4. Care should be taken that,

　　wherever possible, the load on a surface plate is distributed over the working

　　surface.

　　5. Use should be made of the

　　full available area of the working surface and not concentrated on any one

　　area.a common form of damage to cast iron surface plates is burrs on the

　　working surface. the excess metal may be stoned away by attention confined to

　　the burr. this operation should be followed by thorough cleaning with abrasive

　　dust. if the surface plate is not required for some days, the surface should be

　　coated with a corrosion preventive, such as petroleum jelly. rusting is a sign

　　of neglect and misuse. its effects can be reduced by frequently wiping the top

　　when in use and by occasionally gently rubbing with another surface plate.

　　6. Users are advised to take

　　advantage of the specialized services of surface plate manufacturers to have

　　surface plates reconditioned.