RU2268805C2 - Mill for plastic working of metallic band - Google Patents

Abstract

FIELD: plastic working of metals, possibly shaping articles of sheet materials.

SUBSTANCE: mill includes mounted in housing deforming stands. In order to work band with thickness 0.3 - 2.5 mm mill includes mounted on housing guiding stand having smooth metallic roll and roll provided with elastic members arranged along it edges and equally spaced from center. Each deforming stand except last one includes roll with elastic envelope of polyurethane and rigid roll with cross shaping grooves. In each next stand except last one pitch of arrangement of said grooves on roll exceeds by two times groove arrangement pitch in previous stand. Height h of shaping grooves is in range 0.3 - 25 mm; thickness of elastic envelope ΔH exceeds 2h; length of le of elastic envelope working portion is in range 1.5 h ≤ le ≤ 2500, mm; length lr of working portion of rigid roll is in range lr ≤ le - (10-30), mm. Last deforming stand includes two rigid rolls with shaping grooves for finish deforming.

EFFECT: lowered size and metal consumption of mill.

5 dwg

Description

The invention relates to a pressure treatment of a metal strip and can be used in the development of equipment for forming products from sheet material.

A promising direction for applying relief on large surfaces (several square meters) of sheet blanks is molding with a deforming shaft with an elastic shell.

Known roll forming mill for processing sheet material containing installed on the frame deforming stands (AS 611701). The disadvantage of the mill is the large metal consumption and the complexity of the setup. The specified device can be taken as the closest analogue.

An object of the invention is to reduce the overall dimensions of the equipment, reducing the metal consumption of the product.

To solve this problem, a mill is proposed for pressure treatment of a metal strip containing deforming stands installed on the bed, for processing the tape 0.3–2.5 mm thick, equipped with a reference stand installed on the bed with a smooth metal roll and a roll with elastic elements located along it to the edges at an equal distance from the center, each deforming stand, except the last one, contains a roll with an elastic polyurethane shell and a hard roll with transverse forming grooves, in each subsequent glue and except the last period, the location of the grooves on the roll is twice higher than in the previous, wherein the height h forming grooves formed between 0,3-25 mm, the elastic membrane thickness? H exceeds 2h, the length of the working part of the elastic shell l _e made within 1.5h≤l _e ≤2500, mm, the length of the working part of the hard roll l _in made within l _in ≤l _e - (10 ... 30) mm, and the last deforming stand contains two hard rolls with forming grooves for final warping.

The proposed mill is presented in figures 1-5. Figure 1 presents a General view, figure 2 is a defining stand, figure 3 - rolls of deforming stands, figure 4 is the last deforming stand, figure 5 is a profiling diagram.

The mill consists of a frame 1, a guiding device 2, stands 3, 4, 5, 6, 7 with roll pairs 8, 9 (Fig. 2), mounted with bearings in the pillows 10 and 11, respectively, the upper pillow has the ability to move vertically along the guides 12 and 13 and adjusting the vertical position with the screw 14 and nuts 15 and 16. The rolls of the stand 7 are driven in rotation from the gear motor 17, then the torque is transmitted sequentially from the subsequent stand to the previous one, i.e. from stand 7 to stand 6, after which from stand 6 to stand 5, from stand 5 to stand 4 and from stand 4 to stand 3. The number of stands and the type of forming grooves may differ depending on the profile of the product.

The mill works as follows: through the guide device 2 in the stand 3 is set to a metal tape. Rolls 8, 9 of stand 3 are made of metal, roll 8 is made smaller than roll 9, two elastic shells 18, 19 of greater radius are fixed on roll 8 at the edges than roll 8. When rolls are brought together, the elastic medium of the shell extends beyond the shortened edge of the roll 9 and is adjacent to its side walls. As the workpiece passes between these rolls, the elastic medium presses the edges of the strip toward the side walls of the roll, thereby forming side edges that serve to further fix the strip on the rolls. An elastic shell 21 is fixed on the roll 20 (Fig. 3) of the stand 4, the roll 22 is made with profiling grooves, the rolls 20 and 22 are brought together so that the deformation of the elastic shell does not exceed 30%.

When a metal tape passes between the rolls, the elastic shell 21 presses the tape into the surface relief of the roll 22. Boxes 5 and 6 have the same design and principle of operation as stand 4, their difference from the previous stand 4 is that each subsequent stand has a period ribs on the roll 2 times more (figure 5).

In the last stand 7 (FIG. 4), two rigid rolls 23, 24 with forming grooves are installed, passing between which the workpiece acquires its final shape.

The use of the invention will reduce the overall dimensions and reduce the metal consumption of the mill.

Claims (1)

A mill for processing a metal strip pressure, containing deforming stands installed on the bed, characterized in that for processing the tape 0.3–2.5 mm thick, it is equipped with a setting stand installed on the bed with a smooth metal roll and a roll with elastic elements located along it to the edges at an equal distance from the center, each deforming stand, except the last, contains a roll with an elastic sheath made of polyurethane and a hard roll with transverse forming grooves, in each subsequent stand, except the last, the period of location of the said grooves on the roll is two times greater than in the previous one, while the height h of the forming grooves is made in the range of 0.3-25 mm, the thickness of the elastic shell ΔH exceeds 2h, the length of the working part of the elastic shell l _e made within 1, 5h≤l _e ≤2500 mm, the length of the working part of the hard roll l _{in is} made within l _in ≤l _e - (10 ... 30) mm, and the last deforming stand contains two hard rolls with forming grooves for final deformation.

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