鑄鐵平板平臺接觸點(diǎn)面積比率的檢驗
時(shí)間：2016/1/25 10:11:40
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將被測鑄鐵平板平臺工作面涂上顯示劑，用不低于其精度等級的平板研合，研合后的被測鑄鐵平板平臺工作面顯示出明顯的接觸點(diǎn)。然后用一在50mm×50mm范圍內刻有2.5mm×2.5mm的400個(gè)方格的透明薄板（例如有機玻璃），置于被測鑄鐵平板工作面的任意位置上，依次觀(guān)察每個(gè)方格內包容接觸點(diǎn)所占面積的份數（以1/10為單位）。求上述份數之和除以4，即為所測試部分的接觸點(diǎn)面積的比率。為取得典型的數值，應在另一位置上測出接觸點(diǎn)面積的比率，求出兩次結果的平均值。
鑄鐵平板平臺技術(shù)要求
1、平板工作面不得有嚴重影響外觀(guān)和使用性能的砂孔、氣孔、裂紋、夾渣、縮松、劃痕、碰傷、繡點(diǎn)等缺陷。
2、平板的鑄造表面應清楚型砂且平整，涂漆牢固。
3、精度等級為0級~3級的平板工作面上，直徑小于15mm的砂孔允許用相同材料堵塞，其硬度應小于周?chē)牧系挠捕?。工作面堵塞的砂孔應不多?個(gè)，且砂孔之間的距離應不小于80mm。
4、平板應采用優(yōu)質(zhì)細密的灰口鑄鐵等材料制造，其工作面硬度應為170~220HB。
5、平板工作面通常采用刮削工藝。對采用刮削加工的3級平板工作面，其表面粗糙度Ra最大允許值為5μm。
6、平板應去磁和穩定性處理。
7、平板相對兩個(gè)側面上，應有安裝手柄或吊環(huán)裝置的螺紋孔（或圓柱孔），且裝置位置的設計應盡量減少因搬運而引起的變形。
8、若平板工作面上設置螺紋孔（或溝槽），其部位應不高于工作面。
Inspection of contact area ratio of cast
iron flat platform
The working surface of the cast iron flat
plate platform to be tested is coated with a display agent, and the flat
surface of the cast iron flat plate platform after the joint test shows a clear
contact point. Then, using a 400 square transparent sheet (for example,
plexiglass) engraved with 2.5 mm × 2.5 mm in a range of 50 mm × 50 mm, placed
on any position of the cast iron plate working surface, and sequentially
observed in each square. The number of copies of the area occupied by the
contact points (in units of 1/10). The sum of the above parts is divided by 4,
which is the ratio of the contact area ofthe tested portion.
To obtain a typical value, the ratio of the area ofthe contact point should be measured at another location to find the
average of the two results.
Cast iron flat platform technical
requirements
1. The flat working surface shall not have
defects such as sand holes, pores, cracks, slag inclusions, shrinkage,
scratches, bumps, and embroidered points that seriously affect the appearance
and performance.
2. The casting surface of the flat plate
should be clear and smooth, and the paint should be firm.
3. On the flat working surface with the
accuracy grade of 0 to 3, the sand hole with diameter less than 15mm is allowed
to be blocked with the same material, and its hardness should be less than the
hardness of the surrounding material. There should be no more than 4 sand holes
in the working face, and the distance between the sand holes should be no less
than 80mm.
4, the plate should be made of high-quality
fine gray cast iron and other materials, the working surface hardness should be
170 ~ 220HB.
5, the flat working surface usually uses
the scraping process. For the 3-stage flat working surface using the scraping
process, the maximum allowable surface roughness Ra is 5 μm.
6, the plate should be demagnetized and
stable.
7. On the opposite sides of the flat plate,
there should be a threaded hole (or cylindrical hole) for mounting the handle
or the lifting device, and the position of the device should be designed to
minimize the deformation caused by the handling.
8. If a threaded hole (or groove) is
provided on the working surface of the plate, its position should not be higher
than the working surface.
Company name: botou zhuoyuan mechanical equipment manufacturing co.,LTD
Registered
address: jiaohe development zone, botou city, hebei province
Fax
number: 0317-8031093
Contact
information: 15369812793 (WeChat with the same number) liansheng chu
Postcode:
062151
Enterprise
email:1358827475@qq.com
Account
Opening Bank: Botou Branch of Bank of China
Account
number: 100399943203
Agricultural
bank account number: 6228481739059615270
http://zhuoyuanjixie.com