鑄鐵平板平臺(tái)接觸點(diǎn)面積比率的檢驗(yàn)

時(shí)間：2016/1/25 10:11:40 瀏覽量：502

將被測鑄鐵平板平臺(tái)工作面涂上顯示劑，用不低于其精度等級(jí)的平板研合，研合后的被測鑄鐵平板平臺(tái)工作面顯示出明顯的接觸點(diǎn)。然后用一在50mm×50mm范圍內(nèi)刻有2.5mm×2.5mm的400個(gè)方格的透明薄板（例如有機(jī)玻璃），置于被測鑄鐵平板工作面的任意位置上，依次觀察每個(gè)方格內(nèi)包容接觸點(diǎn)所占面積的份數(shù)（以1/10為單位）。求上述份數(shù)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(shù)值，應(yīng)在另一位置上測出接觸點(diǎn)面積的比率，求出兩次結(jié)果的平均值。

鑄鐵平板平臺(tái)技術(shù)要求

1、平板工作面不得有嚴(yán)重影響外觀和使用性能的砂孔、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(yīng)清楚型砂且平整，涂漆牢固。

3、精度等級(jí)為0級(jí)~3級(jí)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(yīng)小于周圍材料的硬度。工作面堵塞的砂孔應(yīng)不多于4個(gè)，且砂孔之間的距離應(yīng)不小于80mm。

4、平板應(yīng)采用優(yōu)質(zhì)細(xì)密的灰口鑄鐵等材料制造，其工作面硬度應(yīng)為170~220HB。

5、平板工作面通常采用刮削工藝。對(duì)采用刮削加工的3級(jí)平板工作面，其表面粗糙度Ra最大允許值為5μm。

6、平板應(yīng)去磁和穩(wěn)定性處理。

7、平板相對(duì)兩個(gè)側(cè)面上，應(yīng)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(shè)計(jì)應(yīng)盡量減少因搬運(yùn)而引起的變形。

8、若平板工作面上設(shè)置螺紋孔（或溝槽），其部位應(yīng)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