High rigidity bent section

FIELD: plastic working of metals, namely shaping metallic sheets for lining walls and ceilings.

SUBSTANCE: section includes lengthwise periodic trapezoidal cross- section corrugations arranged by two rows along width of section and mutually spaced by flat inter-corrugation portions of predetermined size and closed semicircular cross corrugations. Each corrugation passes through mean parts of two lengthwise corrugations normally relative to their axes. Height of all corrugations is the same; width of cross corrugation consists of 0.75 - 0.80 of width of lengthwise corrugation.

EFFECT: lowered metal consumption for making sections.

1 dwg, 1 ex

 

The invention relates to products obtained by the processing of metals by pressure, and can be used in the manufacture of sheet bent profiles with closed stiffening corrugations.

These profiles obtained by forming on a special mills, usually contain longitudinal recurrent corrugations of various cross-section is trapezoidal, semicircular, triangular, which are located in one or more rows across the width of the profile and are separated by a flat migomobile areas. These areas are additional design details, such as the upright side obseve rail freight wagons.

The range of above profiles (usually referred to as the profiles of a high stiffness - DRI), refer to the technical specifications 14-101-789-99 Profiles steel high stiffness with recurrent corrugations".

Known high hardness, containing recurring closed corrugations, which has a semicircular corrugations have a depth not greater than 0.25 of their width, and triangular and trapezoidal corrugation - depth not more 0,49 horizontal projection of their inclined side faces (see A.S. USSR №1202662, CL 21D 5/06 with prior. from 10.08.84). However, this DRI has insufficient rigidity in the transverse direction and it makes when it is used in the image quality is as lateral obseve freight wagons to apply uprights 16, that increases the intensity of the wagon.

The closest analogue to the declared object is bent high hardness given in the book Mpfservice and other Profiles "high rigidity", Magnitogorsk, House press, 1996, p.77, DRI No. 15-1300 (1350)×2×1725×39,6×3,6 mm

This DRI contains longitudinal, recurrent corrugations arranged in two rows across the width of the profile and are separated by a flat migomobile areas of a given size, and is characterized by the fact that the profile contains 14 of the corrugations with a trapezoidal cross-section. This DRI also possess sufficient transverse rigidity to the above-mentioned negative aspects, which increases the intensity of its products.

The technical task of the present invention is the reduction of metal products using DRI.

For this task, bent DRI containing the longitudinal periodically corrugated trapezoidal cross-section, arranged in two rows across the width of the profile and are separated by a flat migomobile areas of a given size, further comprises a closed semicircular transverse corrugations, each of which passes through the middle of the two longitudinal corrugations and perpendicular to their axes, the height of all of the corrugations are the same, and the width poperechnov the flute 0.75...0,80 from the longitudinal width of the flute and the profile can contain 14 longitudinal and 7 transverse corrugations or 10 longitudinal and 5 transverse corrugations.

The essence of the proposed technical solution is to increase the transverse rigidity DRI due to the location thereon of the transverse corrugations of the optimal size. It allows you to either reduce the thickness of the DRI (when it has a 14 longitudinal corrugations), or to reduce the number of flat Migatronic areas (if there are 10 longitudinal corrugations)that in both cases reduces metal consumption of products (cars) from DRI.

View of the proposed DRI (its part) in the plan shown in the drawing.

Profile length L, width b and thickness S contains longitudinal trapezoidal corrugations 1, arranged in two rows across the width of the profile and symmetrical to its longitudinal axis XX. Each corrugation has a height of hg, the length l and width bt. The distance between the longitudinal axes of the corrugations bgand along the length of the profile of the corrugations separated by equal migomobile plots 2, the length of which is determined by the number of corrugations and the values of L and l.

Perpendicular to the longitudinal axes of the corrugations 1 has a semicircular corrugations 3 with length lpwidth bpand height hg. Corrugations 3 perpendicular to the corrugation of 1 (i.e. YYXX) and cross every two of them in the middle, i.e. the distance of the axis YY from the ends 4 of the longitudinal corrugations is of 0.51.

The radii of places of rounding 5 trapezoidal corrugations, and at the base of the semicircular corrugations equal to r, and the radius of the semicircular Popper is knogo corrugation is equal to R. The value of bp=(0,75...to 0.80)bt. DRI can contain 14 or 10 longitudinal corrugations or, respectively, 7 or 5 transverse corrugations.

During installation of gondolas DRI is installed vertically and in the middle Migatronic sections 2 and end sections 6 profiles are vertical posts, which are attached by welding profiles.

Tests (test DRI on the longitudinal and transverse bending) was carried out at JSC "Magnitogorsk iron and steel works".

With this purpose, DRI, made of steel AND the same cast that had the same thickness (3.6 mm), the height of the trapezoidal corrugations hg=39,6 mm when the width bt=200 mm and length l=1230 mm, were manufactured in two versions: with the presence of transverse semi-circular corrugations and without them, the total number of longitudinal corrugations on the finished DRI also varied 14 and 10. Corrugated sheets were tested in the longitudinal and transverse curves of concentrated load.

Limit value of the permissible load for longitudinal bending was about the same (for the same number of corrugations) for DRI with additional transverse corrugations, and without them. When lateral bending of the proposed profiles was a load of 2.1...2.4 times larger than the famous DRI. When reducing the width of the transverse corrugation to bp=(0,50...to 0.74)btin an individual with whom ucah was observed cracking these corrugations when lateral bending DRI. The increase in the width of the transverse corrugations to bp=(0,81 1,00...) btreduced maximum allowable load at this bend.

The calculations showed that the moment of resistance with respect to axis XX (see drawing) the proposed DRI is greater than in the known 95.6%, which explains the results of experiments. Thus, experimental validation confirmed the acceptability found technical solutions to achieve this goal and its advantage over the known object, is selected as the closest analogue (see above).

A feasibility study conducted in JSC "MMK", showed that the use of the proposed DRI, for example, as a side obseve railway gondola cars will reduce the amount of metal to make them not less than 1.5%. This will reduce the overall weight of the car and increase its capacity.

Specific example

Bent sheet DRI has the form shown in the drawing, and is intended for the upper side obseve freight gondola.

Profile settings:

L=12075 mm; B=1350 mm; S=3.6 mm; lp=1100 mm; l=1722 mm (10 longitudinal corrugations and five lateral); bt=200 mm; bp=0,77·bt=0,77·200=154 mm; hg=39,6 mm R=60 mm; l′=2415 mm, bg=600 mm, b=375 mm, r=26 mm

Profile made of steel 10 HNDP.

1. Bent high hardness, containing longitudinal lane is adicheskii repetitive corrugation of the trapezoidal cross-section, located in two rows across the width of the profile and are separated by a flat migomobile areas of a given size, characterized in that it further comprises a closed semicircular transverse corrugations, each of which passes through the middle of the two longitudinal corrugations and perpendicular to their axes, the height of all of the corrugations are the same, and the width of the transverse flute 0.75...to 0.80 on the width of the longitudinal corrugation.

2. Profile according to claim 1, characterized in that it contains fourteen longitudinal and seven transverse corrugations.

3. Profile according to claim 1, characterized in that it contains ten longitudinal and five transverse corrugations.



 

Same patents:

FIELD: plastic working of metals, possibly production of bent sections.

SUBSTANCE: stand includes mounted in chocks upper and lower calibrated rolls. Said chocks are arranged in housings having horizontal traverse bars, four guiding struts with diameter d and compression springs. Guiding struts pass through vertical openings of chocks. Compression springs are arranged in struts between upper chocks and horizontal traverse bars of housing. Guiding struts are provided with barrel like portion arranged symmetrically relative to horizontal axis of upper roll and having circular generatrix. Radius R of said generatrix is determined by expression R = 0.5(L + D) where L -distance between centers of chock cross sections along horizontal line. Maximum diameter D of barrel like portion of struts is determined by expression Length of barrel like portion is equal to 1.2 d.

EFFECT: improved quality of bent sections.

2 dwg, 1 ex

FIELD: plastic working of metals, possibly manufacture of facing panels.

SUBSTANCE: method for making corrugated sections comprises steps of increasing number of corrugations in second and several next transitions due to simultaneously shaping at each side of ready section cross corrugations with periodical pitch and one lengthwise corrugation; using shaping mill having roll grooved pass in its stands in the form of two pairs of upper and lower shaping rollers, two pairs of upper and lower lateral calibrating rollers and one pair of central calibrating rollers, upper and lower, arranged between shaping rollers. Roll grooved passes of second and next stands include also two additional upper and lower central calibrating rollers, two upper and lower lateral calibrating rollers and one pair of spacing sleeves. Upper central calibrating rollers have two built-in shaping punches; lower central calibrating has respective grooves; additional lower central calibrating rollers have grooves for cross corrugation shaped in roll pass of previous stand. Spacing sleeves of respective stands are mounted between additional central calibrating rollers, Upper rolls are driven ones; lower rolls are joined with drive unit through driving pinions arranged by cantilever fashion. Runners of coil uncoilers have outer diameter corresponding to outer diameter of calibrating rollers of roll grooved passes of working stands.

EFFECT: enhanced efficiency of method, improved design of mill.

5 cl, 6 dwg

FIELD: plastic working of metals, possibly manufacture of corrugated sections.

SUBSTANCE: section bending mill includes upper and lower guides convergent along shaping direction and arranged in parallel relative to flanges of produced corrugated section; vertically closed traction chains with shaping bodies in the form of bodies of revolution. Shaping bodies are mounted on upper guides and they are non-driven ones in the form of row of rollers. Hinges of vertically closed traction chains are used as driven shaping members: said hinges are in the form of cylinder -rollers that may engage for forming corrugations with row of rollers of non-driven shaping members and may perform rolling motion along shaping direction on driving branches of said chains in lower guides. Said lower guides have friction paths.

EFFECT: simplified design of section sending mill.

3 dwg

FIELD: plastic working of metals, possibly manufacture of commercial bent shapes.

SUBSTANCE: roller table is arranged behind last stand of mill and it includes rollers; group type drive unit; deflecting member in the form of rectangular plate of predetermined height spaced by predetermined distance from last stand depending upon length of shape and mounted with possibility of rotation. Drive rollers are cylindrical ones and they are mounted by cantilever fashion in horizontal supporting sections.

EFFECT: simplified reduced-cost operation of roller table.

2 cl, 1 ex, 1 dwg

FIELD: plastic working of metals, possibly manufacture of commercial bent shapes.

SUBSTANCE: drive unit is group type unit and it includes motor, reduction gear, sprockets and Gall's roller chain with power and tension gear wheels mounted respectively at inlet and at outlet of transporting roller table. Main sprockets are mounted in axles in supports; intermediate sprockets are mounted on axles with rollers of roller table. Power gear wheel drives sprockets to motion by means of Gall's roller chain whose rupture effort is calculated beforehand.

EFFECT: simplified reduced-cost operation of roller table.

1 ex, 2 dwg

FIELD: plastic working of metals, possibly manufacture of non-equal flange channel sections.

SUBSTANCE: method comprises steps of successively bending from pass to pass edge members of strip blank by predetermined bending radiuses while changing concrete values of bending angles in direction of shaping. In first and second passes bending angle α of small flange of section is set equal to 24 - 25° and in pre-final pass bending angle α is set equal to 10°. Bending angle of large flange in pre-final pass is increased relative to such angle of previous pass by 8 - 9°. Bending radiuses for all passes are constant ones and they are equal to doubled thickness of section.

EFFECT: improved quality of non-equal flange channel sections due to their enhanced geometry and due to lowered manufacturing expenses.

1 ex

FIELD: plastic working of metals, possibly bending of cylindrical blanks.

SUBSTANCE: roll type machine includes upper cylindrical roll with bearing units, detachable plate having rectangular lengthwise groove and supporting columns mounted on it; two lower rolls. Lengthwise groove of detachable plate has shoulders and windows. Upper roll is mounted is mounted on frame in struts. After barrel of upper roll rigid ring-halves with eyelets are mounted and they are mutually joined by means of tightening members. Eccentric shaft with eccentric is mounted on said detachable plate. Set of spring sheets is arranged in windows of lengthwise groove. Said sheets engage with shoulders of lengthwise groove and with eccentric of eccentric shaft. Columns may move and engage with eyelets of ring-halves.

EFFECT: possibility for bending up edges of sheet metal by predetermined radius.

2 cl, 3 dwg

FIELD: equipment for plastic working of metals, namely manufacture of high-rigidity sections.

SUBSTANCE: tool includes upper and lower rolls mounted with gap. Lower roll has shaping protrusions arranged on preset part of roll barrel circumference. Upper roll has cover plates in its grooves. Length of shaping protrusion of lower roll consists of 0.69 - 0.71 of its barrel circumference. Cover plate in each groove of upper roll is arranged along 0.17 - 0.18 of barrel circumference and it is spaced by minimally possible distance from front (along rolling direction) end of shaping protrusion of lower roll.

EFFECT: lowered consumption of rolls, improved geometry of high-rigidity sections.

1 dwg, 1 ex

FIELD: plastic working of metals, namely manufacture of thin-wall sections.

SUBSTANCE: method comprises steps of cutting flat blank by two bands at preliminary shaping stage; removing burrs from cut line by micro-grinding; feeding cut blank to first profiling stand for preliminary shaping through two grooved passes. In second stand for preliminary shaping lateral deformed portions are bent by value depending upon mechanical properties of blank metal and used shaping schedule. Then cross corrugations are partially rolled out at leveling inner stresses and deformations along cross section due to increased rate of profiling in comparison with profiling rate in first stand for preliminary shaping. First and second profiling stands of apparatus being unit for preliminary shaping and they have working roll drive in the form of system of outer gear transmissions providing possibility for enhancing profiling rate at outlet of first stand. Profiling rolls are paired rolls mounted with possibility of separate profiling of two blanks and they have closed working gage. Shafts for mounting profiling rolls are in the form of inserts. Housing of stand unit is cast of two blocks parting along axis of upper shafts.

EFFECT: improved quality of sections, enlarged manufacturing possibility and enhanced efficiency of process.

5 cl, 6 dwg

FIELD: technological equipment of shape bending mills for shaping in rollers, mainly coated blanks for making products with four or more bent zones.

SUBSTANCE: end guide of stand includes upper and lower bearing units mounted in working shafts of stand with shaping rollers; vertical axle arranged in plane of symmetry axes of working shafts of stand. Axle end portions are mounted in upper and lower bearing units. Spacing sleeves and functional roller are mounted on said axle. At making shape from coated band, vertical axle is mounted with possibility of fine adjustment of its position along working shafts of stand. Functional roller has working portion made of elastic material and it is mounted with possibility of contact with shaping rollers by means of circular beads provided on peripheral zones of its end faces.

EFFECT: prevention of damage of blank coating in bending zones, lowered labor consumption of bending operations, comport procedure for adjusting guide.

2 dwg

Shape bending mill // 2243841

FIELD: rolled stock production.

SUBSTANCE: shape bending mill used, mainly for producing tinned corrugated sheets includes successively mounted first guiding stand with cylindrical rolls, shaping duo-stands and pairs of vertical centering rollers. Shaping stands are assembled to units (each unit includes 3 - 5 stands) and mounted on common foundation plate of unit. Vertical centering rollers and additional one or two pulling devices are alternatively arranged between said units. Only first guiding stand is fully driven one. All even and last shaping stands have driven lower and idle upper rolls; odd stands have two idle rolls.

EFFECT: lowered production costs, enhanced quality of shapes.

3 cl, 1 dwg, 1 ex

FIELD: rolled stock production, namely equipment of shape bending mills, mainly for making tinned corrugated sheets.

SUBSTANCE: drive unit of shape bending mill with first guiding stand and pulling roller devices includes motor, reduction gear, sprockets, forcing and tensioning gear wheels, roller chain embracing sprockets along S-shaped curve and sine curve. Torque of motor is transmitted only to lower shaping rolls of even stands and of last stand of mill and also to both rolls of guiding stand and to horizontal rollers of pulling devices through sprockets mounted on their axles. Chain embraces sprockets of rolls of guiding stand and of rollers of pulling devices along S-shaped curve and it embraces sprockets of drive rolls and sprockets that are not joined with shaping rolls along sine curve. Axles of sprockets that are not joined with shaping rolls may be arranged higher than axles of lower drive rolls by value determined according to relation given in claims of invention.

EFFECT: lowered cost of shape bending mill, reduced power consumption for profiling, enhanced quality of ready shapes.

2 cl, 1 dwg, 1 ex

FIELD: plastic working of metals.

SUBSTANCE: method comprises steps of deforming sheet blank by drawing it through closed working gage of draw plate; using linear electric motor at making shapes. In order to draw blank through closed working gage of draw plate at smoothly deforming it, pulling effort uniformly distributed along the whole length of deformation zone is provided. Said pulling effort is created due to interaction of traveling magnetic field induced in winding of stator of linear electric motor with eddy currents induced in blank for moving blank according to traveling magnetic field. Apparatus for making shapes of sheet blank includes draw plate with closed working gage. Apparatus for making shapes of electrically conducting material includes linear electric motor supporting draw plate with closed working gage; the last is fixed to said motor. It is possible to use as linear electric motor single-side linear electric motor, double-side linear electric motor or cylindrical linear electric motor.

EFFECT: enlarged manufacturing possibilities, enhanced quality of shapes.

5 cl, 6 dwg

FIELD: plastic metal working.

SUBSTANCE: apparatus for corrugating sheet material includes shaping members rigidly mounted on shafts. Shafts are rotated in opposite directions by means of their drive units. On one shaft shaping members are arranged normally relative to axis of shaft; on other shaft shaping members are arranged symmetrically relative to said normally arranged member and in pairs at mutual inclination angle α in range 15° < α < 90°.

EFFECT: possibility for making constructional members of panels with noise absorption properties.

2 dwg

FIELD: plastic working of metals.

SUBSTANCE: stand includes housing, shaping aggregate. The last is in the form of two rigidly and mutually joined jaws in which two horizontal shafts-inserts are mounted. On said shafts-inserts shaping rollers joined with drive mechanism are rigidly mounted one over another with possibility of changing inter-axial distance. Shaping aggregate is in the form of stand module whose jaws consist of dismounted frameworks. Horizontal shafts-inserts with shaping rollers are mounted in movable carriages with possibility of their vertical motion. Shaping rollers are mounted in bearing assemblies of movable carriages and they are joined by key joint with said horizontal shafts-inserts. In order to provide possibility for changing inter-axial distance, horizontal shafts-inserts with shaping rollers are mounted in movable carriages whose vertical motion is timed with use of kinematic circuit and adjusted by means of two lead screws. Each of said screw has thread portions with mutually opposite direction of thread. Stand module is arranged on platform mounted in foundation with possibility of inclination in vertical plane by angle up to 30є due to its motion in annular grooves of foundation by means of worm pair. The last includes segment rigidly joined with platform; worm engaged with said segment.

EFFECT: enlarged manufacturing possibilities and increased module quantity of construction.

3 cl, 4 dwg

FIELD: plastic working of metals, possibly manufacture of shapes.

SUBSTANCE: machine includes mounted according to manufacturing process: stand for preliminarily shaping and drive profiling stands with shafts mounted by cantilever fashion. Free ends of shafts are closed by means of stirrup and paired rollers mounted in shafts and having closed profiling gap with basing on vertical and horizontal mounting surfaces of rollers. Each working shaft has basic bead. In each lower shaft two sleeves of designed size are mounted. Lower roller is mounted between said sleeves. Each stirrup is jointly mounted in housing with possibility of motion, fixation in horizontal plane and rotation by 180º and it is provided with two slides holding shafts and allowing to move them and fix in vertical plane. Each pair of rollers has in each stand basic plane supported by sleeve; dimension of sleeve is determined according to given mathematical relation.

EFFECT: elimination of tuning profiling axis at readjustment of machine.

3 dwg

FIELD: plastic working of metals.

SUBSTANCE: apparatus includes shaping members mounted with possibility of plastic deforming of sheet material placed between them; drive unit of shaping members and drive unit for feeding sheet material to working zone. Shaping members are in the form of pair of rolls arranged in parallel; each roll has on diametrically opposite sides of its surface extended along rotation axis stepped slopes with end surfaces turned to the same peripheral direction. Drive unit of shaping members is in the form of synchronized rotation drive designed for rotating rolls in opposite directions and it is combined with drive unit for feeding sheet material. Working and end surfaces of both rolls may be in the form of mutually adjacent annular protrusions and annular recesses embracing rotation axis of rolls. Annular protrusions of one roll are arranged between annular protrusions of other roll.

EFFECT: enhanced operational efficiency, simplified design of apparatus.

2 cl, 8 dwg, 2 ex

FIELD: rolled stock production, possibly manufacture of cold bent rolled shapes.

SUBSTANCE: roll includes arbor with diameter d having flange, shaping members with predetermined rolling diameter D and unit for securing them to arbor. Said unit is arranged at side of mill drive and it includes cylinder-cone locking ring mounted on arbor and three stops equally spaced one form other and secured to arbor by means of bolts. Stops have upper and lower cylindrical surfaces whose diameters are equal respectively (0.7- 0.8)D and d. Lateral surfaces of stops are parallel to roll axis; their end surfaces are normal relative to roll axis. Generatrices of inner cylindrical surfaces of stops turned to shaping members are inclined by angle α = 68 -70° to roll axis and they engage with cone surface of locking ring whose generatrix is inclined by angle α to roll axis.

EFFECT: enhanced quality of bent shapes due to their improved geometry, lowered costs of production process.

2 dwg, 1 ex

FIELD: rolled stock production, possibly manufacture of cold drawn shapes of sheet materials, namely coated corrugated sheets.

SUBSTANCE: apparatus includes pair of horizontal drawing rollers that are spaced one from other by preset adjustable gap. Barrels of horizontal rollers are made of fit on axle rubber rings mutually spaced by maximum vertical gap equal to maximum height of corrugations. At both sides of rollers two pairs of vertical rollers are mounted with possibility of changing distance between rollers of each pair. Distance along rolling axis between vertical rollers and axial vertical plane of horizontal rollers is selected according to given relation.

EFFECT: enhanced quality of coating, lowered costs for making shapes.

3 cl, 1 dwg, 1 ex

FIELD: rolled stock production, possibly development of shape bending mills.

SUBSTANCE: drive unit includes motor, reduction gear, power and tension gear wheels, pairs of upper and lower supports where sprockets embraced along curve by means of Gall's chain are mounted on shafts. Said supports are arranged by two mutually parallel rows; axes of all pairs of supports of mutually opposite rows are in different vertical planes. All sprockets are arranged in one vertical plane between rows of supports.

EFFECT: lowered cost of drive unit and reduced expenses for its operation.

3 cl, 2 dwg, 1 ex

Up!