SU867457A1

SU867457A1 - Method of producing high-stiffness sections

Info

Publication number: SU867457A1
Application number: SU802899113A
Authority: SU
Inventors: Игорь Стефанович Тришевский; Владимир Леонидович Ахлестин; Марк Ефимович Докторов; Олег Игоревич Тришевский; Павел Григорьевич Остапущенко; Владимир Кириллович Тригуб
Original assignee: Украинский Ордена Трудового Красного Знамени Научно-Исследовательский Институт Металлов; Научно-Исследовательский Институт Санитарной Техники И Оборудования Зданий И Сооружений
Priority date: 1980-03-26
Filing date: 1980-03-26
Publication date: 1981-09-30

Description

1one

Изобретение относитс к обработке о металлов давлением и может быть использовано при изготовлении профилей высокой жесткос ти с пересекающимис продольными и поперечными гофрами, например, панелей теплообменников формовкой в валках.The invention relates to the processing of metals by pressure and can be used in the manufacture of profiles of high stiffness with intersecting longitudinal and transverse corrugations, for example, heat-exchanger panels by roll forming.

Известен способ изготовлени профилей высокой жесткости с пересекеиощимис продольными и поперечными гофрами, по которому сначала, примен нат жение заготовки, отформовывают продольные гофры вдоль кромок , а затем на центральном участке заготовки выт жкой формообразовывают поперечные гофры 1.A known method of making high-stiffness profiles with cross-cutting longitudinal and transverse corrugations, according to which, first, applying the tension of the workpiece, longitudinal corrugations are formed along the edges, and then transverse corrugations are formed by stretching the central section of the preform.

Недостатком способа вл етс то, что при изготовлении профилей с относительно глубоким поперечными гофрами на участке сопр жени гофров происходит см тие и ра.зрывы металла.The disadvantage of this method is that in the manufacture of profiles with relatively deep transverse corrugations at the mating section of the corrugations, the metal is broken and fractured.

Цель изобретени - повышение качества путем предотвращени см ти и разрывов металла на участке сопр жени продольных и поперечных гофров.The purpose of the invention is to improve the quality by preventing the metal from seeming and breaking at the interface of the longitudinal and transverse corrugations.

Указанна цель достигаетс тем, что при изготовлении профилей высокой жесткости с пересекающимис This goal is achieved by the fact that in the manufacture of high stiffness profiles with intersecting

продольными гофрами путем отформовки продольных гофров вдоль кромок с последующей выт жкой на центральном участке поперечных гофров, одновременно с формовкой продольных гофров отформовывают участки сопр жени гофров, выполн их переменными по глубине в направлении поперечного гофра, затем одновреto менно с формовкой поперечных гофров эти участки доформовывают до требуемой конфигурации.longitudinal corrugations by forming longitudinal corrugations along edges followed by stretching in the central section of transverse corrugations, simultaneously with the molding of longitudinal corrugations, forming sections of the coupling of corrugations, making them variable in depth in the direction of the transverse corrugation, then simultaneously forming the transverse corrugations required configuration.

На фиг.1 изображена заготовка с отформованными продольными гофра15 ми и участками их сопр жени с поперечными гофрами; fia фиг. 2 - профиль с отформованными продольными и поперечньв-1и пересекающимис гофрами; на фиг.З - разрез В-Б на фиг.2; Figure 1 shows a blank with molded longitudinal corrugations and areas of their mating with transverse corrugations; fia FIG. 2 - profile with molded longitudinal and transverse-1 and intersecting corrugations; on fig.Z - section bb in figure 2;

20 на фиг. «3 - разрез А-А на фиг.1.20 in FIG. "3 - section aa in figure 1.

Claims

According to the proposed method, in the process of fabricating profiles with stiffness with intersecting longitudinal and transverse corrugations from the sheet blank, first simultaneously with the longitudinal section and the corrugations, the interface sections are formed, and then the transverse corrugations passing through the formed sections of the interface are stretched. The proposed method can be implemented using two pairs of vapkov with vtuklykymn and concave cfiopMykvdimi elements. At the same time, a pair of rolls contains forming alamenias for forming longitudinal corrugations and y jacTKoB matching, and the second for longitudinal and transverse corrugations. The coincidence of the transverse corrugations during their shaping with the molded sections of the mating of the G13Ch-Evags ™ known synchronization devices. Thus, in accordance with the proposed method, a profile with cross-section longitudinal and transverse corrugations is produced by simultaneous forming on the sheet, preform 1 of longitudinal corrugations 2 located along the edges of the moldable preform, 3 sections of conjugation of longitudinal 2 and transverse 4 of corrugations. After this, transverse corrugations 4 passing through the mold joints form part of the segment. The portions of the three conjugations are made with a variable depth along the length with a maximum corresponding to a predetermined depth across the corrugation 4 at the straight section of the intersection of the corrugations 2 and with a smooth exit at an angle d- to the flat parts of the workpiece 1. With their transverse depth of 6.5 mm from an aluminum strip with a thickness of 1.5 mm, the quality of the profile formed by the proposed method satisfies the requirements. The waviness of the profile edges is no more than 1 mg in the areas of There were no smiles and metal breaks. When forming the same profile according to the known method, on the mating areas at a transverse corrugation depth of 5 f / tM, metal is observed, and at a depth of 6.5, Hapvajje metal fusion on the sections of edge intersection are longitudinal .; and Gyuperechnyh corrugations. According to a pilot test, the proposed method, compared with H3secTHiJf-i, will provide an improvement in the quality of the profiles by preventing the metal from seeing and breaking in the junction sections of the longitudinal and transverse corrugations. In addition, the proposed method prevents the waviness and folding of metal on the edges and flat sections of the profile when being molded relatively deep to the transverse corrugations, more uniformly distribute the forming forces in the cages, especially when making profiles with relatively long transverse corrugations 1I. The economic effect will be obtained by increasing the productivity and reducing the laboriousness of making profiles, reducing scrap and improving the performance properties of boilers made from these profiles. The invention The method of designing high rigidity profiles with intersecting longitudinal and transverse corrugations includes forming longitudinal corrugations along edges followed by stretching in the central section of transverse corrugations, so as to improve the quality by preventing the metal from collapsing and breaking at the joints longitudinal and transverse corrugations, simultaneously with the formation of longitudinal corrugations, shape the mating sections of the corrugations, making them variable in depth in the direction of transverse first corrugation and then simultaneously with the forming of transverse corrugations doformovyvayut these sections to the desired configuration. Sources of information taken into account in the examination. US patent W 3394573, CL. 72-196, 06/30/68.