In the process of steel consumption, cold bending process is used in demand. Today, we will stop explaining this process.

　　由于高強(qiáng)鋼板所構(gòu)成的高剛性型鋼具有很大的慣性矩和抗彎模量，特別是由于應(yīng)用上的請求需求預(yù)沖孔后停止冷彎加工消費，會構(gòu)成資料外表平整度和資料邊緣尺寸上的差別，因而請求對該類高強(qiáng)度構(gòu)造板的冷彎孔型的設(shè)計中需求多加側(cè)向定位安裝，合理設(shè)計孔型，合理布置軋輥間隙等，確保進(jìn)入每道孔型的資料不跑偏并盡可能地消弭資料外表平整度和資料邊緣尺寸上的差別對后續(xù)冷彎成型外形的影響；另一個突出的特性為：高強(qiáng)度構(gòu)造板材的成型回彈現(xiàn)象較嚴(yán)重，回彈會招致呈現(xiàn)弧邊，必需依托過彎來修正，且過彎角比擬難控制，需求在消費調(diào)試過程中停止調(diào)整修正。

　　Because the high rigidity section steel made of high strength steel sheet has great inertia moment and bending modulus, especially because the requirement of application requires that the cold bending process should be stopped after pre-punching, which will make the difference between the data surface smoothness and the data edge size. Therefore, more lateral positioning and installation are required in the design of the cold bending pass of this kind of high strength structural plate, and reasonable design of the pass is required. Reasonable arrangement of roll clearance to ensure that the data entering each pass do not deviate and eliminate as much as possible the influence of the difference in surface smoothness and data edge size on the shape of subsequent cold bending forming; another prominent feature is that the springback phenomenon of high strength structural sheet is serious, and springback will cause arc edge, which must be corrected by over-bending, and the ratio of over-bending angle It is difficult to control, and the adjustment and revision of demand are stopped in the process of consumption debugging.

　　需求較多的成型道次。在輥式冷彎成型過程中主要加工過程為彎曲變形，除產(chǎn)品彎曲角部分有細(xì)微減薄外，變形資料的厚度在成型過程中假定堅持不變；在孔型設(shè)計時，要留意合理分配變形量，特別是在道，后面幾道，變形量不易過大。另外能夠運用側(cè)輥和過彎輥，對鋼板停止預(yù)彎，且使型材斷面的中性線與廢品型材的中性線重合，使型材上下所受的力均衡，從而防止縱向彎曲。假如在加工過程中發(fā)現(xiàn)縱向彎曲，可依據(jù)實踐狀況增加局部軋輥，特別留意后面幾道。

　　More moulding passes are needed. In roll cold bending process, the main processing process is bending deformation. In addition to the slight thinning of the bending angle, the thickness of deformation data is assumed to remain unchanged during the forming process. In pass design, attention should be paid to the rational distribution of deformation, especially in the first and the latter routes, the deformation is not too large. In addition, the side roll and overbending roll can be used to stop the pre-bending of the steel plate, and make the neutral line of the profile section coincide with the neutral line of the scrap profile, so that the force on the profile is balanced up and down, thus preventing the longitudinal bending. If longitudinal bending is found in the process of processing, local rolls can be added according to the actual situation, paying special attention to the following several routes.

　　其它如運用矯直機(jī)停止矯直，變卦機(jī)架間距，采用托輥，調(diào)整各架次的軋輥間隙等措施均可減小或消弭縱向彎曲。需求留意的是，經(jīng)過調(diào)整各架次的軋輥間隙來減輕縱向彎曲需求有純熟的技術(shù)才行。

　　Other measures, such as using straightener to stop straightening, changing the distance between racks, using idlers and adjusting the clearance of rolls in various sorties, can reduce or eliminate the longitudinal bending. It should be noted that skilled technology is needed to reduce the need for longitudinal bending by adjusting the roll clearance of each sortie.

　　輥式冷彎速度的控制，成型輥壓力的調(diào)整要適宜，盡量減少重復(fù)冷彎彎曲疲倦裂紋，并恰當(dāng)停止光滑和冷卻，進(jìn)一步減少熱應(yīng)力裂紋的產(chǎn)生等，控制彎曲半徑，即彎曲半徑不能太小，否則產(chǎn)品外表易產(chǎn)生裂紋，針對高強(qiáng)鋼板在冷成形冷彎工藝中呈現(xiàn)的后延性斷裂現(xiàn)象，為了滿足構(gòu)造設(shè)計請求，倡議在滿足資料的力學(xué)設(shè)計請求的前提下優(yōu)化截面外形，如增加彎角半徑，減小冷彎角或加大截面外形等方式處置也是一種卓有成效的辦法。

　　Controlling the speed of roll cold bending and adjusting the pressure of forming roll should be appropriate to minimize fatigue cracks in repeated cold bending, stop smoothing and cooling properly, and further reduce the generation of thermal stress cracks. Controlling the bending radius, i.e. the bending radius should not be too small, otherwise the appearance of products is prone to cracks. Aiming at the delayed fracture of high strength steel plate in cold bending process of cold forming For example, in order to satisfy the requirement of structural design, it is proposed to optimize the section shape on the premise of satisfying the requirement of mechanical design of data, such as increasing the radius of bending angle, reducing the cold bending angle or increasing the section shape.