In the construction steel, according to different construction needs, the types of steel are also different, including channel steel, which is a kind of long steel with groove section. For unfamiliar friends, what kind of cutting process does channel steel have? Next, let's talk about the cutting process of channel steel by the small editor of Jinan angle channel steel?

槽鋼剪切工藝介紹

Introduction to channel steel shearing process

1、工藝原因：

1. Process reasons:

該機組的設計能力為20萬t/a，但現在的產量達到了60萬t/a，冷床區生產能力不足的問題很突出，與生產角鋼相比，槽鋼的冷卻速度較慢，從而造成剪切時槽鋼溫度較高，非常容易出現塌肩、毛刺、撕裂等缺陷，并且對剪刃壽命的影響較大。

The design capacity of the unit is 200000 t / A, but now the output has reached 600000 T / A. the problem of insufficient production capacity in the cooling bed area is very prominent. Compared with the production of angle steel, the cooling speed of channel steel is slow, resulting in higher channel steel temperature during shearing, which is very prone to shoulder collapse, burr, tear and other defects, and has a great impact on the service life of the shear blade.

2、剪刃設計原因：

2. Design reason of cutting edge:

槽鋼剪刃設計的基本依據是槽鋼成品孔型形狀，如圖1所示(以100#槽鋼為例)。這種設計在剪切過程中易出現以下問題：一是槽鋼兩肩部與其他部分相比，相對較厚，所需剪切力也較大，剪刃磨損較快，剪刃使用一段時間后。這一部分相對磨損量大，致使肩部間隙較大，易出現塌肩現象；二是槽鋼兩腿與腰部處相比，由于剪切角度的影響，當剪刃磨損后，在剪切兩腿時，剪切量變小，腿部剪切由通常的剪斷變成了撕斷，槽鋼腿端面非常容易出現毛刺；三是上、下剪刃腿部斜度與槽鋼成品孔型基本一致，這樣在剪切時腿部基本同時受力，剪切力較大，剪刃磨損較快，一方面腿端剪切壓痕嚴重，另一方面剪刃老化后，容易出現槽鋼剪切部分撕裂、毛刺較多的現象。后兩點是影響槽鋼剪切質量的主要原因。

The basic basis for the design of channel steel cutting edge is the finished pass shape of channel steel, as shown in Figure 1 (taking 100# channel steel as an example). This design is prone to the following problems in the shear process: first, compared with other parts, the two shoulders of the channel steel are relatively thick, the required shear force is also large, and the wear of the shear blade is fast. After the shear blade is used for a period of time. The relative wear of this part is large, resulting in large shoulder clearance and easy shoulder collapse; Second, compared with the waist, due to the influence of the shear angle, when the shear blade is worn, when cutting the two legs, the shear amount becomes smaller, the shear of the legs changes from normal cutting to tearing, and the end face of the channel leg is very prone to burrs; Third, the inclination of the legs of the upper and lower shear edges is basically the same as that of the finished channel steel. In this way, the legs are basically stressed at the same time during shearing, the shear force is large, and the shear edge is worn quickly. On the one hand, the shear indentation at the leg end is serious, on the other hand, after the shear edge is aged, it is easy to tear and Burr the shear part of the channel steel. The latter two points are the main reasons affecting the shear quality of channel steel.

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