卷板預彎工藝的對中操作介紹

1、卷板預彎工藝的對中操作介紹Three bending process1 卷板由預彎(壓頭)、對中和卷彎三個過程組成。roll plate by bending (head), and roll bending of three process.預彎(壓頭)在三棍卷板機或預彎壓力機上進行。當預彎板厚不超過20mm 的情況下，可采用預彎也一塊鋼板作為彎模，其厚度不應大于板厚的兩倍，長度應比板略長，將彎曲模放入輥筒中，將板料置于彎模上，壓下上輥并使彎模來回滾動使板料邊緣達到所要求的彎曲半徑。同時采用彎模預彎時，必須控制彎曲功率不超過設(shè)備能力60%，操作時應嚴格控制上輥的壓下量，以防過載損壞設(shè)備。在壓

2、力機上用模具預彎適用于各種板厚，用長度比板料短的通用模具，預彎時必須分段進行，預彎兩端，預彎尺寸根據(jù)工件卷圓卷板機種類而定。 如 20*2000 卷板機端面預彎尺寸是250-300； 8*2000卷板機端面預彎尺寸是150-200。bending (pressure head) in three stick machine or bending machine. When bending thickness under the condition of less than 20 mm, bending can be used also as a steel plate bending die,

3、 its thickness should not be greater than twice the thickness, length should be slightly longer than the board, the bending die is put into the roller, puts sheet metal bending mold, pressure roller and the bending modulus back and forth rolling sheet edge to achieve the required bending radius. Usi

4、ng curved bending mould at the same time, must control bending power equipment capacity by 60%, not more than operation should strictly control the roll reduction, in case of overload damage the equipment. In presses with bending mould is suitable for various thickness, with a general mold length sh

5、orter than sheet metal, and must be segments when bending, bending, bending the size according to the type of workpiece, roll round machine. Such as 20 * 2000 rolls end bending size is 250-300; 8 * 2000 bending roll end bending size is 150-200.對中，將預彎的板料置于卷板機上滾彎時，為防止產(chǎn)生扭曲將板料對中，要使板料的縱向中心線與輥筒軸線保持平 行。對中方

6、法有幾種：3 on, bending sheet metal in roll on roll bending machine, in order to prevent to produce distortion in the sheet will be to, to make the sheet metal of longitudinal centerline remain parallel to the roll axis. There are several ways for the:（ 1 ） 在三輥卷板機上利用擋板使板邊靠緊擋板；on the three-roller plate us

7、ing baffle plate edge by tight damper;2） 將板料抬起使板邊靠緊側(cè)輥，然后再放平；the sheet up to make the edge will be tight side roller, and then flat;把板料對準側(cè)下輥的直槽；roll under the sheet metal on the side of the straight groove;用目視觀察輥筒的中間位置，上輥的外形線與板邊是 否平行調(diào)整對中。(4) with the visual observation of the intermediate position of

8、 the roller, the roller contour lines and edge parallel to the adjustment.圓柱的卷彎，將板料位置對中后，一般采用多次進行滾彎，調(diào)節(jié)上輥，逐步壓下上輥并來回滾動，使板料的曲率半徑逐漸減小直至達到規(guī)定的要求，在卷彎過程中，應不斷地用樣板檢驗彎板兩端的曲率半徑。卷彎半圓(瓦片)時也應卸載 后測驗量其曲率。cylindrical roll bending, the plate location for, generally using multiple times to roll bending, roll adjustment

9、, pressure roller and rolling back and forth, step by step to make sheet metal curvature radius decreases until reached the requirements of regulation, in the process of roll bending, should constantly use template radius of curvature at the ends of the test plate. Roll bending round (tiles) should

10、also be its curvature after unloading test.矯圓工藝、圓筒卷彎焊接后會發(fā)生焊后變形，所以必須進行矯圓。矯圓分加載、滾圓和卸載三個步驟。先根據(jù)經(jīng)驗或計算，將上輥筒調(diào)節(jié)到重要的最大矯正曲率的位置，使板料受彎。板料在卷板機輥筒的矯正曲率下來回滾卷1-2 圈，著重在滾卷焊縫區(qū)附近用卡樣板檢查，使整圈曲率均勻一致，然后在釀酒設(shè)備滾卷的同時，逐漸退回輥筒，使工件在逐漸減少矯正混凝土輸送泵載荷下多次滾卷至要求，也可用手矯 圓。圓錐面的卷彎過程與圓柱面制作工藝相似。5 round correction technology, drum roll bending wil

11、l occur after welding deformation after welding, so must be round correction. Circle points loaded and rolling and uninstall three steps. According to experience or calculated first, and will roll on the adjustment to the important position of the maximum curvature correction, make the sheet metal b

12、ending. Blank in curvature to rectify the bending roll roller down to rollback (1-2 laps, emphatically in the roll weld zone near the card sample to check, make the whole circle of curvature uniform, and then roll up at the same time, gradually returned to the roller, the workpiece under the load gr

13、adually reduce correction roll up to a request for many times, also can use hand round correction.On the surface of the conical roll bending process similar to cylinder production process.卷板質(zhì)量：卷板質(zhì)量問題包括外形缺陷、表面壓傷和卷裂 三個方面。roll plate quality: the quality of rolled plate problems including crushed appear

14、ance defects, surface and volume split in three aspects.外形缺陷，在操作中要注意以下現(xiàn)象：a 礦用網(wǎng)片卷彎圓柱形筒體時外形出現(xiàn)過彎、錐形、束腰、邊緣歪斜和棱角等現(xiàn)象是應及時處理，發(fā)現(xiàn)過彎時用大錘錘擊筒體的邊緣可使直徑擴展，過彎就可以消除，卷圓時在每次調(diào)節(jié)輥筒后用樣 板檢查其彎曲度。appearance defects, in the operation should pay attention to the following phenomena: roll bending of a cylindrical barrel shape ap

15、pear when cornering, conical, beam waist, the edge is skewed, and the phenomenon such as edges and corners shall be handled in time, found that when cornering with the edge of the sledge hammer the barrel can make the diameter of the extension, cornering can eliminate, crimping after each adjustment

16、 roller use sample to check its curvature.表面壓傷：鋼板或輥筒表面的氧化皮及粘附的雜質(zhì)會造成板料表面壓傷。A.在卷板前，必須清除板料表面的氧化皮。B 卷板設(shè)備必須保持干凈，輥筒表面不得有銹、毛刺、棱角或其它硬性顆料。C.在卷板時應不斷地吹掃內(nèi)外側(cè)剝落的氧華皮。 D 矯圓時應盡量減少反轉(zhuǎn)次數(shù)等。surface crushed: steel plates or scale on the surface of the roller and adhesion of impurities can cause surface pressure plate. A.

17、in front of the coil plate, must remove oxide coating on the surface of the sheet metal. B board equipment must be kept clean, roller surface must not have rust, burrs, sharp edges or other hard material. C. when rolled plate should be constantly scavenging oxygen flake inside and outside of China.D

18、 when circle should reduce as far as possible reversal frequency correction, etc.卷裂：板料在卷板時，由于變形太大，材料的冷作硬化以及應力集中等因素都有使材料的塑性變壞而造成裂紋。為了防止卷裂的產(chǎn)生 A.以采取限制變形率，鋼板進行正火處理；.對缺口敏感性大的鋼材，最好將材料預熱到150-200 C后卷 制。C板料的纖維方向與彎曲線垂直，拼接焊縫需經(jīng)修磨等 措施。crack: sheet in coil plate, due to the deformation is too large, the material

19、of the cold work hardening and stress concentration factors have made material plastic worse and cause crack. In order to prevent the formation of volume split a. to take limit deformation rate, normalizing treatment plate; B.the notch sensitivity of steel, it is best to material preheat to 150-150

20、after coiling. C. vertical sheet metal fiber direction and bending line, thebutt welds should be measures by grinding, etc.零件的彎曲成型parts bending forming鋼板型材在常溫下冷彎曲時，內(nèi)側(cè)彎曲半徑應大于兩倍板厚，在冷作彎曲后使零件外側(cè)不得有裂紋。steel plate material of cold bending at room temperature, the inside of the bend radius should be greater

21、 than twice the thickness, in cold bending after the lateral parts must not have cracks.熱煨零件。鋼管、板材彎曲不得少于最小彎曲半徑。加熱熱溫度控制在900-1000范圍內(nèi)，不得在藍脆區(qū)( 200-400)范圍內(nèi)進行。彎曲成型部位用樣板檢查，與樣板之間的局部間隙不得大于2。roasted parts. Steel pipe, plate bending shall not be less than the minimum bending radius. Heat temperature control wi

22、thin the scope of the 900-1000 , shall not be in blue brittle zone (200-400 ) range. Bending forming parts using model checking, partial clearance between template and shall not be greater than 2.4 組裝工藝assembly process組裝前，首先應熟悉零部件圖樣，根據(jù)圖樣和技術(shù)要求弄清產(chǎn)品的特性用途，各零件之間的相對位置、尺寸和連接方法，明確組裝基準面和組裝工夾具，再定組裝方法。before a

23、ssembly, the first should be familiar with spare parts drawings, according to the drawings and technical requirements to the product characteristics, USES, the relative position between the various parts, size and connection methods, clear assembly datum and assembly tooling, and assembly methods. 52 組裝前將零件匯總并經(jīng)檢驗合格。. 2 summary before assembly parts and the inspection.組裝場地的地面應平整、清潔、堆部件堆放要整齊不使損 壞。the assembly site ground should level off, clean, heap parts stacked in order not to damage.對復雜的結(jié)構(gòu)件組裝可以分部進行。for complex structure assembly division.組裝后定位點焊，作以下規(guī)定：after assembly positioning spot