(1)鉆孔是C型鋼檁條制造中的一種常用方法，可用于幾乎明顯規格鋼板和型鋼的孔加工。鉆孔的原理是切削，孔壁損傷小，成孔精度高。鉆孔在鉆床上進行。當構件受場地狹窄限制，特殊加工部位不易用鉆機加工時，可采用電鉆、風鉆加工。

(1) Drilling is a common method in the manufacture of C-type steel purlin, which can be used for the hole processing of almost any specification of steel plate and section steel. The principle of drilling is cutting, with small hole wall damage and high hole forming accuracy. Drilling is carried out on a drilling machine. When the components are limited by the narrow site and the special processing parts are not easy to be processed by drilling machine, electric drill and pneumatic drill can be used for processing.

(2)沖孔在沖床(沖床)上進行。一般只能在較薄的鋼板和型鋼上沖孔，孔徑一般不小于鋼材厚度。也可用于不重要的節點板、墊板、角鋼支撐等小零件的加工。

(2) Punching is done on a punch (punch). Generally, the hole can only be punched on the thinner steel plate and section steel, and the hole diameter is generally not less than the steel thickness. It can also be used for the processing of unimportant gusset plate, base plate, angle steel support and other small parts.

沖孔生產效率高，但由于孔周圍冷加工硬化，孔壁質量差，有塌孔和孔底增加的趨勢，因此，除對孔質量要求不高外，還是作為預制孔(未加工孔)，C型鋼檁條直接使用較少。當螺栓孔與螺栓的距離較大時，即孔徑大于50mm時，也可采用火焰切割。

Punching production efficiency is high, but due to the cold work hardening around the hole, poor quality of hole wall, hole collapse and hole bottom increase trend, therefore, in addition to the hole quality requirements are not high, or as a prefabricated hole (unprocessed hole), C-steel purlin is less used directly. When the distance between the bolt hole and the bolt is large, that is, when the hole diameter is greater than 50 mm, flame cutting can also be used.

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The above content is today for you to share about the commonly used C steel cutting and drilling methods and how to adjust the drilling pressure of all the introduction, I hope to help you, later need to call us or pay attention to our website: Jinan C steel http://m.liondatech.com Our staff will contact you in time