Straightening can improve the residual stress distribution in the cutting process of punching C-section steel and the zero cutting of formwork. When the stress distribution of the steel plate section is uneven, roll bending measures can be taken to add deformation to compensate for the uneven longitudinal fiber length, and then eliminate it. Wavy bending makes the internal stress of punched C-section steel uniform. The adjustment of horizontal crown value of straightener is also an important measure to improve the residual stress distribution of C-section steel.

光纖激光切開機(jī)的切開速度能夠恰當(dāng)提高切開質(zhì)量，即切開稍窄，切開面潤(rùn)滑，減少變形。切開速度過(guò)快，因而切開線能量小于要求值，沖孔C型鋼切開縫處的射流無(wú)法吹散熔化的切開熔體，構(gòu)成很多后續(xù)阻力，隨同切開C -鑄鋼加工斷渣時(shí)，切開面質(zhì)量下降。當(dāng)速度高時(shí)，甚至因?yàn)榍虚_太寬而導(dǎo)致圓弧平息，可見杰出的切開質(zhì)量與切開速度是分不開的。

The cutting speed of fiber laser cutting machine can properly improve the cutting quality, that is, the cutting is slightly narrow, the cutting surface is lubricated and the deformation is reduced. The cutting speed is too fast, so the cutting line energy is less than the required value. The jet at the cutting seam of punching C-section steel can not blow away the molten cutting melt, forming a lot of subsequent resistance. When cutting C - cast steel, the quality of the cutting surface decreases. When the speed is high, even the arc subsides because the cutting is too wide. It can be seen that the excellent cutting quality is inseparable from the cutting speed.

切開速度過(guò)低時(shí)，由于切開部位是等離子弧的太陽(yáng)，為了堅(jiān)持電弧本身的穩(wěn)定性，太陽(yáng)散斑或太陽(yáng)區(qū)有必要找到離狹縫近的驅(qū)動(dòng)電流電弧，一起它會(huì)流入射流。徑向傳遞更多的熱量，使切斷變寬，切斷兩邊的熔化物在下緣集合并凝結(jié)，構(gòu)成不易固定的熔渣，切斷上緣為加熱并熔化以構(gòu)成圓角。

When the cutting speed is too low, because the cutting part is the sun of the plasma arc, in order to maintain the stability of the arc itself, it is necessary to find the driving current arc close to the slit in the solar speckle or solar area, and it will flow into the jet together. More heat is transferred radially to widen the cut-off. The melts on both sides of the cut-off gather and condense at the lower edge to form molten slag that is not easy to be fixed. The upper edge of the cut-off is heated and melted to form a fillet.

沖孔C型鋼剪切層流冷卻引起的內(nèi)應(yīng)力不平衡主要是由三種冷卻不均勻引起的，導(dǎo)致：橫向冷卻很不均勻。厚度方向不對(duì)稱冷卻。厚度和側(cè)冷混合物不均勻。操縱厚度方向上的橫向均勻性和冷卻對(duì)稱性來(lái)操控板的平整度并減少板的內(nèi)部應(yīng)力。經(jīng)過(guò)較低的噴頭改進(jìn)了側(cè)冷卻和側(cè)噴計(jì)劃。選用側(cè)角和靜水點(diǎn)，完成層流冷卻溫度操控的均勻性。

The internal stress imbalance caused by shear laminar cooling of punched C-section steel is mainly caused by three kinds of uneven cooling, resulting in very uneven transverse cooling. Asymmetric cooling in thickness direction. Uneven thickness and side cooling mixture. Manipulate the transverse uniformity and cooling symmetry in the thickness direction to control the flatness of the plate and reduce the internal stress of the plate. Improved side cooling and side spraying plans with lower nozzles. Select the side angle and static water point to complete the uniformity of laminar cooling temperature control.