Introduce

Four stainless steel different dia時靜meter diameter and generic points熱大, such as pipe diameter fo微時ur through the end are the same size;音如 different diameter fou訊路r. Charge the same si門關ze, and the size is smaller校廠 than the head of b廠司ranch pipe pipe size. A stainless stee鄉討l four pass is a 男舞pipe for the branch of a pipe. 大微For the use of s答計eamless tube manufacturing for 木紅four links, there are two 劇聽commonly used processes: h坐東ydraulic bulging and hot p鐵窗ressing. The hydraul會店ic bulging of the A. hydraulic bulgi服見ng four - way is a fo媽人rming process of expa服相nding the branch pipe throug術購h the axial com下現pensation of th玩我e metal material. The process is to 姐子use special h自麗ydraulic machine, tube with fo喝唱ur equal diameter are in女從jected into the liquid但高 through the two level分有 side hydraulic cylinder syn飛生chronous motion of 市黃extrusion billet, billet e村跳xtrusion volume change, th人個e liquid in the tube with the時子 tube size and the pressure, wh請志en achieved the four branch expansi多歌on required pr街服essure, the metal materi低是al in the cylinder 務器and tube blank inner liquid pressure un喝熱der the dual ro綠拍le of the mold cavity flow and expan樂體sion pipe. The four 門員- way hydraulic bul雪樹ging process can費員 be formed once, and the production e火呢fficiency is high; the head of th慢報e four - pass and th男煙e wall thickness of the shou費南lder are increased. B務計ecause the hydraulic bulging process慢件 of seamless four - pa慢飛ss is large in tonnage, it i風對s mainly used in the manufacturi美算ng of standard wall thickness f兒那our through less than DN討照400 at home. The su上媽itable forming materials are low carbo習線n steel, low alloy steel歌這 and stainless steel她工 with relatively low cold hardenin不聽g tendency, including s去劇ome non-ferrous metals, such a哥通s copper, aluminum 水得and titanium. B. hot forming f做做our hot forming tube blank wil劇匠l be greater than four in diam友民eter, about four to fla有動tten the size o但他f the diameter, open a h吃喝ole in the pipe tensile part; bil通木let heated in車理 forming mod通人el, and the tube is arranged in the 高明pipe drawing die; under the actio北這n of pressure tube is in the p算習rocess of radial 購訊compression, radial com就笑pression in the dir少懂ection of flow and the f外秒ormation of metal pip現東e to pipe in the drawing di們知e. The whole process i樂照s formed through the rad靜視ial compression of高司 the tube an近議d the drawing process of the branc南老h pipe. Differ我雪ent from the hydraulic bulgi時金ng four, the metal o歌亮f the hot pressed four - pass p樂作ipe is compensated by the radial moti媽離on of the tube, so it is also 舞農called the r外紅adial compensati公議on process. The tonnage of the equ也對ipment needed for the material formi微河ng is reduced because of the use靜歌 of four - pass after heating. The ho務北t pressing four way has wide ad廠厭aptability to materials在服, and is suitable for mate紅知rials of low carbon s視文teel, alloy steel and stainless 市日steel. Especially for large di個線ameter and thick wall four links, th從能e forming pr公現ocess is usually adopted.

Standard

Makes the standard can be 房白divided into standard, standard, water習北, electricity Americ快場an Standard, German 她空standard, Japanes從匠e standard, R在能ussian standard, specific such as 冷業GB/T12459, GB/T13401,

ASME B16.9, SH3408, S這懂H3409, HG/T21635, DL/T 695, 著司SY/T 0510, DIN 2615