SU1360850A1 - Arrangement for piecewise manufacturing of roll-formed sections - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to the equipment for roll forming mills, and can be used in metallurgy in the manufacture of curved profiles, in agricultural and other fields of engineering. and profile. The device contains forming stands with the rollers placed one above the other and directed by wiring. In the lower rolls of the adjacent stands, annular grooves are made in the central part along the length of the roll. The guide wiring at its ends is positioned in these annular grooves. The ends of the wiring extend beyond the axial lines of the rolls. This arrangement allows you to save the coating profile, such as zinc. When forming a profile. At the same time, when additional forces are applied to the profile in the final molding zone, additional reactive forces are applied perpendicular to its wall from the side of the wiring to the side of the bending of the shelves. 1 hp f-ly, 4 ill. i (L oo O5 o QO ate

Description

11360850

The invention relates to the processing of metals by pressure, in particular to the equipment of roll forming mills in the manufacture of curved sections.

The aim of the invention is to improve the quality of the profiles by reducing the friction between the guide wires and the profile.

Fig. 1 schematically shows a device for the production of profiles; figure 2 - section aa in figure 1; FIG. 3 is a diagram of the formation of an input end-piece profile; in FIG. 4, forming stands with guide wiring.

The device contains a pair of rolls 1 and 2, consisting of elements 3-6, installed in the working shafts 7-10

ten

connectors along the axis of symmetry of the grooves, for example, element 5 consists of a left base semi-half 21 and right half a semi 22, with a surface 23 of the connector.

The device is installed as follows.

First, the base half legs 21 and the upper rolls 4 6 are installed. Then, the wiring 15 is placed on the upper surface of the tables 16, which are first inserted with the input 19 and the output 20 ends of the wiring 15 into the ring 15 grooves of the elements 3 and 5, the side rollers 14 are mounted on the axis of the sliders. 17, adjust the tables 16 in height and fasten the wiring 15 with screws 18. Then install the right half 30

adjacent stands 11 and 12, fixed 20 rollers 22, after which the rollers regulate the bed 13, side rollers 14 and guide wires 15 mounted on tables 16 of side rollers 14. Side rollers 14 are mounted on sliding sliders 17, and guides The wiring 15 is fastened with screws 18 to the upper surface of the tables 16. In each of the roller elements 3 and 5 of the adjacent pairs of rolls 1 and 2 in the profile section is wide and an annular groove is made with width b and depth h. In these grooves installed input 19 and output 20 ends of the postings 15, i.e. The ends 19 and 20 of the postings 15 are made in the form of a section of annular grooves. The upper surface of the wiring 15 is tangential to the working surface of the stream of the lower roller elements 3 and 5. The input 19 and output 20 guiding wiring are made going 0.05-0.15 of the distance between cells 1. 1 - (0.05-0.15 A) 1 is the value of the outgoing part of the input end of the wiring; (0.05-0.15) 1 - the value of the outgoing part of the output end of the wiring. Working contact can be flat or symmetrical curvilinear. The posting length is equal to. The magnitude of the protruding parts 1. and 1. must be greater than the jiaccTOH value — not from the axial plane of the rolls to the catching part of the lower roll f. An increase in the value of 1 and Ij interferes with the placement in the interspace of the tables for the side rollers and others. auxiliary tool.

Bottom elements 3 and 5 to facilitate the installation of the wiring 15 in the groove of elements 3 and 5 make the composite with

The gap is set in the brook and the rolls are fixed.

In the manufacture of curved profiles in the rolls of the bending mill, the driving piece 24 enters the mold pair of rolls 1 to perform a given shaping. Before entering into the forming pair of rolls 1, the piece blank 24 is caught by the guide wiring 15 installed in the annular groove of the lower element 3 with the dimension b, which is smaller than the size a of the main section profile. Regarding the profile section, the forming profile is formed. Moving from the piece blank 24, moving along the upper surface of the wiring 15, the stream of the lower element 3 meets with inclined sections at a distance of 35

40

f from the axial plane of the rolls 1, rises without distorting the shape of the section of the workpiece due to the non-rigidity of the workpiece above the molding level to

with the working surface of the upper element 4 at a distance m from the axial plane of the rolls 1. By the working contour of the upper element 4, the moving workpiece 24 is fixed and deposited on the stream of the lower element 3. When the piece billet sinks, the main shape of the workpiece 24 is formed in the transition in accordance with the dimensions of the stream rolls 1. In practice for non-rigid profiles, the deformation proceeds more accurately according to the scheme depicted in FIG. 3 In the initial stage of shaping | Sending the front end of the workpiece

50

connectors along the axis of symmetry of the grooves, for example, element 5 consists of a left base semi-half 21 and right half a semi 22, with a surface 23 of the connector.

The device is installed as follows.

First, the base half legs 21 and the upper rolls 4 6 are installed. Then, the wiring 15 is placed on the upper surface of the tables 16, which are first inserted with the input 19 and the output 20 ends of the wiring 15 into the circular grooves of elements 3 and 5, the side rollers 14 are mounted on the axis of the sliders. , adjust the tables 16 in height and secure the wiring with 15 screws 18. Then install the right semi

rolls 22, then in control rolls

The gap is set in the brook and the rolls are fixed.

In the manufacture of curved profiles in the rolls of the bending mill, the driving piece 24 is included in a mold pair of rolls 1 to perform a given shaping. Before entering into the forming pair of rolls 1, the piece blank 24 is caught by the guide wiring 15 installed in the annular groove of the lower element 3 with the dimension b, which is smaller than the size a of the main section profile. Regarding the profile section, the forming profile is formed. Moving from the piece billet 24, moving along the upper surface of the wiring 15, the stream of the lower element 3 meets with inclined sections at a distance of

rolls 22, then in control rolls

f from the axial plane of the rolls 1, rises without distorting the shape of the section of the workpiece due to the non-rigidity of the workpiece above the molding level to

with the working surface of the upper element 4 at a distance m from the axial plane of the rolls 1. By the working contour of the upper element 4, the moving workpiece 24 is fixed and deposited on the stream of the lower element 3. When the piece billet sinks, the main shape of the workpiece 24 is formed in the transition in accordance with the dimensions of the stream rolls 1. In practice for non-rigid profiles, the deformation proceeds more accurately according to the scheme shown in FIG. 3 In the initial stage of shaping | Saping the front end of the workpiece

24 is directed by a bulge towards shaping.

Formed during the draft, the blank 24 receives a longitudinal distortion of the front end before encountering the top surface of the wiring 15 at a distance of 6 from the axial plane of the rolls 1. The further piece blank 24 enters the final profile forming zone, which lies on both sides of the axial surface of the rolls, is formed and rule by moving along the guide 15. The size of the size a. 510 mm in the case of the use of guide wiring 15. At the same time, the radial forces of straightening the upper roll to the wiring are balanced by the reactive forces of the lower cylindrical over the 20th bridge of the annular grooves of the lower rolls to the wiring 15c

Rolled 1 piece billet 24 moves along guide wiring 15 until it comes into contact with side 25 rollers 14 mounted on table 16, and then before meeting with the next forming pair of rolls 2. Sloping sections of a stream of lower element of roll 5 at a distance f of moving 30 non-rigid the profile enters the zone of the deformation zone and rises above the molding level without longitudinal distortion at an angle ll due to the elastic deformation of the profile over the length equal to .jg

 between the adjacent pairs of rolls 1 and 2, reaches contact with the working surface of the upper element 6 at a distance m from the axial plane of the rolls 2, settles into the stream of the lower roll of element 5, taking the shape of a curvature before meeting the guide wiring distance from axial

The main diameters of the upper and lower rolls of the first pair of P are 150 mm. The diameters of the subsequent pairs of rolls are increased by 0.5 mm against the previous pair. The guide wiring is set on the table for the side rollers in the space between the second and third pairs of rolls. The lower rolls are made with annular undercuts with dimensions b mm; h 25 ° mm with a 13.2 mm (the largest section of the profile) and split on the OS profile. The total wiring length is 480 m with 1 400 mm, 1 40 mm, 1 40 mm, 1, 210 mm, b, h, the length of the broadened part of the wiring. The input and output ends of the wiring are installed in the ring of the exit grooves of the lower rolls, and the wiring itself is fixed on the supporting surface of the table 16 for side rollers 14 with screws 18.

Piece blank 24 at a distance of 35 mm from the axial plane of the swath is caught by the guide wires, and at a distance of f 34 mm by the inclined sections, the stream of the lower rolls is lifted without distortion to a height of 5 mm until it contacts the working surface of the upper roll at a distance of 1 22 mm After this, the piece billet is deposited and shaped into a profile with a shape close to 20 flexible shelves, curved with a front end convexity down the radius R 80 m at a distance of 7 mm from the axial

of the roll plane, the piece blank 1 rests on the upper surface of the wiring, slides over the surface of the wiring, and reigns in the final forming area between the surface

surface of the rolls 2. Then, the driving cable 45 of the wiring 15 and the upper roller 4 of the races profile 24 in the area of the final molding is molded and adjusted by the upper roller 6 and moved to the next pair of rolls of the roll forming mill (not shown).

Experimental profiling was carried out on a 6-stand roll forming mill (0.5 ... 2) x (20 ... 100) at a molding speed of V 30 m / min. Bent channel-type profile with dimensions in mm :. 20x20 1.4 mm and an internal radius of R 2 mm obtained from the billet section 1, mm, length 1846 mm,

50

55

the dial force of the upper roll. The straightened piece blank 24 passes over the surface of the wiring through the working surface of the side rollers and then goes into the third pair, where a relatively non-rigid profile is caught by the inclined surfaces of the lower roll stream, which ensured a rise of 5-6 mm before meeting the upper roller. This rise due to the non-rigid form of the intermediate profile and with a considerable inter-cage distance does not distort the profile. The rise continues to

0

five

0

5 0 g

0

cut from sheet metal, interstate distance 1,400 mm.

The main diameters of the upper and lower rolls of the first pair of P are 150 mm. The diameters of the subsequent pairs of rolls increased by 0.5 mm against the previous pair. The guide wiring is mounted on a table for side rollers in the space between the second and third pairs of rolls. The lower rolls are made with annular undercuts with dimensions b mm; h 25 ° mm with a 13.2 mm (the size of the section of the profile) and split along the axis of the profile. The total wiring length is 480 mm with 1 400 mm, 1 40 mm, 1 40 mm, 1, 210 mm, b, h, the length of the broadened part of the wiring. The input and output ends of the wiring are installed in the annular recesses of the lower rolls, and the wiring itself is fixed to the supporting surface of the table 16 for the side rollers 14 by screws 18.

Piece billet 24 at a distance of 35 mm from the axial plane of the rolls is caught by guide wires, and at a distance of f 34 mm in inclined sections, the stream of the lower rolls is lifted without distortion to a height of 5 mm until it contacts the working surface of the upper roll at a distance of 1 22 mm. After this, the piece billet is deposited and molded to form a profile close to 20 flexible shelves, curved with a front end convexity down the radius R 80 mm at a distance of 7 mm from the axial

of the roll plane, the piece blank 1 rests on the upper surface of the wiring, slides over the surface of the wiring, and reigns in the final forming area between the surface

0

five

the dial force of the upper roll. The straightened piece blank 24 passes over the surface of the wiring through the working surface of the side rollers and then goes into the third pair, where a relatively non-rigid profile is caught by the inclined surfaces of the lower roll stream, which ensured a rise of 5-6 mm before meeting the upper roller. This rise due to the non-rigid form of the intermediate profile and with a considerable inter-cage distance does not distort the profile. The rise continues to

contact of the profile wall in the transition with the main diameter of the upper roll D, by which the profile in the transition precipitates and forms with a curvature of R 80 mm through the front end of the wall before contact with the bearing surface of the wiring, where it is formed by an angle of 50 °, is governed by the radial height of the upper roll and then moves to the next fourth pair of rolls. The parameters of the process of forming the third pair of rolls: mm, m 30, e 10 "m.

Major distortions of the front end of the workpiece occur in the first two three cells with significant bending angles to impart a certain rigidity to the profile, then the curvature of the front end of the profile becomes insignificant and is easily right separately.

The application of the proposed device improves the quality of the profile obtained by keeping the layer of the intrusive coating and more precise bending the profile section.

Claims (2)

1. A device for the production of bent profiles by piece, containing molding cells with rollers placed one above the other and guide wiring, characterized in that, in order to improve the quality of the profiles by reducing the friction between the guide wires and the profile in the lower rolls of the cage in the central working parts along the length of each roll are made with an annular groove, and the guide wires with their ends are installed in the roll grooves of two adjacent stands, while the guides Wiring in the axial plane of the rolls is made in the form of annular grooves and their upper surface is made flush with the working surface of the lower rolls. 2. A device according to Claim 1, from which it is understood that the input and output ends of the guide wiring are made along the length of the rolls beyond the axial lines of 0.05-0.15 intercellular distance. 1 Editor O. Golovach 4 Compiled by L.Samokhvalova Tehred M.KhodanychSorrector S.Cherni Order 6178/13 Circulation 731 Subscription VNIIPI USSR State Committee for inventions and discoveries. 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, st. Project, 4