RU2062155C1 - Shape bending mill for making corrugated shapes - Google Patents

Abstract

FIELD: pressure forming of sheet material by special-form rolls. SUBSTANCE: shape bending mill includes stands with forming drive rolls and additional non-driven rollers, mounted before the stand on guides. The guides are mounted on a cross pieces in struts with possibility of adjustable motion along flanges of a corrugated shape to be formed. Axis of the rollers are normal relative to the guides. The rollers themselves are arranged with a predetermined pitch. Lateral guides are displaced relative to rollers of central guides along a motion direction of the shape by a distance, equal to an interval of a touching point of a front end of the blank and the roller up to a zone of inlet biting of that blank by a whole depth of a roll grooved pass. EFFECT: enhanced efficiency of the mill. 2 cl, 5 dwg

Description

 The invention relates to the processing of sheet material by pressure using rolls of a special form and is intended for use in ferrous metallurgy, transport engineering and construction in the production of corrugated rolled profiles.

 Known roll forming mill for the production of corrugated profiles containing stands with upper and lower forming drive rolls and additional non-drive rollers mounted on the upper and lower crossbars mounted in racks with the possibility of movement with subsequent fixing / 1 /.

 In the known mill, when profiling a workpiece, only the direction of rotation of the central roller profiles coincides with the longitudinal movement of the workpiece. The direction of rotation of the side rollers that are on the same axis as the central one does not coincide with the movement of the side corrugations they form, because these formed corrugations converge to the center of the workpiece / to the central corrugation /, as a result of which there is a lateral movement of the side shelves of the formed profile along the rollers. This necessary movement is created due to the transverse tension of the walls of the profile with increasing incision of the caliber into the upper and lower rolls from one stand to another.

 The transverse movement thus obtained leads to injury to the surface of the profile shelves and to wear of the rollers, and wall tension increases the pressure on the rollers, which requires increased drive power. In this case, the formation of side corrugations occurs in subsequent stands. The step of the stands is relatively large for the formation of new corrugations, and this leads to a lengthening of the mill, to a large metal consumption and complicates its adjustment.

 The technical problem to which the invention is directed is to reduce energy consumption while improving the quality of profiles, reducing wear of the rollers, reducing metal consumption and simplifying the adjustment of the mill by combining the direction of rotation of each roller with the movement of its rolled parts / shelves / workpiece.

где r радиус роликов,
h высота калибра.The problem is solved in that the shaped mill containing stands with upper and lower forming drive rolls and additional non-driven rollers mounted on the upper and lower crossbars mounted in racks with the possibility of movement with subsequent fixing, according to the invention is equipped with upper and lower guides arranged in parallel shelves of the resulting corrugated profile and mounted on the respective cross members, while non-drive rollers are mounted on rails, and the axis of the rollers are perpendicular to the last. The rollers located on the upper and lower guides for forming adjacent to the central corrugation are offset from the corresponding rollers placed on the guides for forming the central corrugation, towards the drive rolls by a distance, the value of which is determined from the following relationship:

where r is the radius of the rollers,
h caliber height.

 In this case, the rollers for forming each subsequent corrugation are offset relative to the corresponding rollers placed on the guides for forming the central corrugation, by the value nl, where n is the serial number of this guide with respect to the guide with rollers for forming the central corrugation.

 In FIG. 1 shows the proposed mill, the main view; figure 2 cross section bb in figure 1; figure 3 view aa in figure 1; figure 4 view BB in figure 1; in FIG. 5 is a diagram for determining the minimum distance between rollers of adjacent waves along the movement of a workpiece with a sequential shaping system.

 The roll forming mill comprises a bed 1, having two front legs 2 and two rear legs 3, a working (pulling) stand 4 with drive 5 for generating rolling pull, guides central 6, upper lateral 7, 8 and lower 9. All guides are equipped with rollers 10 , 11, 12, 13, 14, 15. Each strut front 2 and rear 3 are interconnected by cross members: upper 16 and lower 17.

 The cross-members on the uprights are installed in height using jacks 18 and are fixed by clamps 19. On the cross-members, the guides are fastened by clamps 20. The forming stand gauge 4 consists of the upper 21, 22 and lower 23, 24 shaped rolls. The axes of all the rollers 11, 12, 13, 14 and 15 are perpendicular to their guides, and the rollers themselves are mounted on the guides with a step t equal to the length of the smooth transition section when bending the profile elements to a given angle for each roller. On the side guides 8, the rollers 14, 15 are mounted one below the other with a solution between them equal to the thickness of the workpiece 25, and are intended for molding its edges.

 To obtain a given profiled sheet, the guides are placed on the cross members and cross members in the racks so that the first rollers of the lower and upper guides touch the surface of the workpiece 25 from the inside of each shelf of future corrugations, and the last rollers are opposite the corresponding shaped rolls 21, 23 of the working stand 4, then there is a scan for each corrugation formed after each roller to be unchanged in length.

 Roll forming mill operates as follows.

 After installing the guides, the workpiece during the first rolling is pulled into the working (pulling) stand through the guide rollers using a sling or push stand installed in the initial corrugation zone (the guides may be shorter). The workpiece, passing along the guides, which horizontally converge with each other and, as the gap between them decreases, the upper and lower guides in these spaces deepen into each other, gradually corrugate, i.e. taper with an increase in the height of the corrugations. Then it enters the shaped rolls 21, 22, 23, 24 of stand 4, where the draft of the wavy profile takes place to the desired shape.

 For complex profiles, if necessary, several stands are installed.

 The guides during this installation will be parallel to the formed shelves, and the direction of rotation of all the rollers will accordingly coincide with the movement of their profile shelves, i.e. the conditions for the formation of corrugations, both central and all neighboring ones, are the same.

где r радиус роликов,
h высота калибра,
а ролики для формовки каждого последующего гофра смещаются относительно соответствующих роликов для центрального гофра в том же направлении на величину nl, где n порядковый номер данной направляющей по отношению к центральной направляющей.The roll forming mill can be made for the sequential shaping of the corrugations, the rollers 11, 13 located on the lower and upper guides for forming adjacent to the central corrugations are displaced relative to the corresponding rollers 10, 12 placed on the guides for forming the central corrugation towards the drive rolls of the stand 4 at a distance l. This distance is determined from the point of contact with the roller of the front end of the workpiece to the ascent of this workpiece to the full depth of the caliber, i.e. to the intersection of the vertical axial plane of the rollers, and is determined from the following relationship:

where r is the radius of the rollers,
h caliber height
and the rollers for forming each subsequent corrugation are displaced relative to the corresponding rollers for the central corrugation in the same direction by the value nl, where n is the serial number of this guide with respect to the central guide.

 The use of this roll forming mill eliminates the transverse slippage of the workpiece on the rollers, which reduces the energy consumption and wear of the rollers, and also improves the quality of the profile and simplifies its adjustment. In this mill, the metal consumption and the occupied area for its placement are significantly reduced. YYY2 YYY4

Claims (2)

 1. Roll forming mill for the production of corrugated profiles, containing stands with upper and lower forming drive rolls and additional non-drive rollers mounted on the upper and lower crossbars mounted in racks with the possibility of movement with subsequent fixing, characterized in that it is equipped with upper and lower guides located parallel to the shelves of the formed corrugated profile and mounted on the respective cross members, while non-driven rollers are mounted on the guide lancers, and the axis of the rollers are perpendicular to the last. 2. The mill according to claim 1, characterized in that the rollers located on the upper and lower guide rollers for forming adjacent to the central corrugations are offset relative to the corresponding rollers placed on the guides for forming the central corrugation towards the drive rolls by a distance determined from the dependence

where r is the radius of the rollers;
h caliber height
wherein the rollers for forming each subsequent corrugation are offset relative to the corresponding rollers placed on the guides for forming the central corrugation, by the value nl, where n is the serial number of this guide with respect to the guide with rollers for forming the central corrugation.

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