CN103357797B - Forming device and method through uneven stretching and in-plane bending of aluminum alloy plate - Google Patents
Forming device and method through uneven stretching and in-plane bending of aluminum alloy plate Download PDFInfo
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- CN103357797B CN103357797B CN201310289762.3A CN201310289762A CN103357797B CN 103357797 B CN103357797 B CN 103357797B CN 201310289762 A CN201310289762 A CN 201310289762A CN 103357797 B CN103357797 B CN 103357797B
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Abstract
The invention discloses a forming device and method through uneven stretching and in-plane bending of an aluminum alloy plate. The forming method comprises the following steps: fixing the aluminum alloy plate through a clamping part; realizing the partial uneven stretching of the aluminum alloy plate in the length direction through the rotation of a mechanical device; accumulating and coordinating partial deformation to enable the aluminum alloy plate to deform in an in-plane bending manner so as to form a circular ring. The device and the method have the advantages that the rotation radius of the upper edge of the aluminum alloy plate is larger than that of the lower edge of the aluminum alloy plate through the rotation of the mechanical device; during the process of rotation, the increment of the arc length of the upper edge is larger than that of the arc length of the lower edge of the aluminum alloy plate, so that the upper edge and the lower edge of the aluminum alloy plate are lengthened unevenly; according to the principle of incremental forming, the partial deformation is accumulated and coordinated so as to enable the aluminum alloy plate to deform in an in-plane plastic bending manner; then the aluminum alloy plate develops in the direction of forming the circular ring; meanwhile, due to an intermittent loading procedure, parts with different radians and complex shapes can also be formed.
Description
Technical field
The present invention relates to field of machining, specifically a kind of alloy plate material uneven pulling in-plane bending building mortion and manufacturing process.
Background technology
When metal blank is by dull uneven pulling distortion, can be shaped at in-plane bending and forms circular ring-shaped member.This forming mode is different with stress state from the load path of traditional plastic bending, make use of plastic deformation inhomogeneities, there is tempting application prospect, in the past, the annular element such as snap ring, metal gasket is mostly formed by sheet metal forming, waste material is more, and in-plane bending manufacturing process have save material, flexible degree is high, energy consumption is low and the feature such as efficient, is a kind of Precision Forming Technology that can give full play to material forming potentiality.Particularly Japan has received publicity and has been used successfully to ring-shaped article processing abroad, domestic, and belong to initiative work, achievement in research is in this respect also few.
Chinese patent CN101844190A(strip internal bending formation method of continuous and local uneven loading surface of sheet) describe a kind of thickness direction of strip that makes and be subject to chrominance signal, thus produce uneven elongation at length direction, compatibility of deformation result makes strip be configured as in-plane bending annular element, and keep the streamline of organizing of metal not to be destroyed, improve the mechanical property of annular element and the utilization rate of material, but, the mode of this compression, the poor fluidity of the material in sheet metal deformation district, easily there is unstability in strip, it is wrinkling that the form of unstability comprises outer rim, spatial warping and inner edge wrinkling, affect the stability of forming process and the forming accuracy of part, the life-span of mould and completing of subsequent handling.The handsome Jin He village Tian Cheng of NEC communication university is at document (Influence of pitch and cross-sectional ratio of strip ofsheet metal on incremental in-plane bending, Journal of Materials ProcessingTechnology, Volumes155 – 156, 30November2004, Pages1810 – 1814) propose to carry out the in-plane bending shaping that local chrominance signal realizes uneven elongation on strip length direction in a thickness direction, this local regularity is by intermittently loading realization, the forming limit of material can be given full play to, but, this load mode is difficult to carry out uneven cooperation control, state modulator is more complicated, in material flow process, suffered resistance is larger, the less stable be shaped.
Summary of the invention
For overcome in prior art adopt chrominance signal mode in-plane bending forming process in the poor fluidity of material in sheet metal deformation district, strip easily occurs that outer rim is wrinkling, spatial warping and inner edge wrinkling, affect the deficiency of the stability of forming process and the forming accuracy of part, the present invention proposes a kind of alloy plate material uneven pulling in-plane bending building mortion and manufacturing process.
The alloy plate material uneven pulling in-plane bending building mortion that the present invention proposes comprises base, pump housing frame, cursor, turning cylinder, the first fixture block, movable block, the second fixture block, hydraulic action cylinder and hydraulic pump.Hydraulic pump is arranged on the upper surface of described base, and hydraulic action jacket casing is contained on the output shaft of hydraulic pump, and the other end of described hydraulic action cylinder is connected with cursor; Cursor is installed on the rotating shaft, and the locating surface on the lower surface that cursor is coordinated with turning cylinder locating surface and turning cylinder is fitted; Movable block is positioned at cursor side, and the alignment pin of this movable block is arranged in the regulating tank of base, for adjusting the position of movable block on base according to tensile elongation.First fixture block and the second fixture block are arranged on the upper surface of cursor and movable block respectively, for compressing plate.
Have the fixed block of protrusion at a centre of surface of pump housing frame, there is the installing hole of pump housing frame pin at the center of this fixed block.Have location-plate respectively in the both sides on another surface of pump housing frame, the bottom of hydraulic pump is placed between two location-plates, and realizes the location to hydraulic pump bottom by this location-plate.
The upper surface of cursor is the installed surface of the first fixture block and turning cylinder nut, and there is the square three-way groove for installing hydraulic action cylinder cursor one end; The height of described square three-way groove is slightly larger than the height of reduced diameter section, the width of described square three-way groove be the hydraulic action cylinder reduced diameter section external diameter coordinated with it doubly, when the reduced diameter section of hydraulic action cylinder is arranged on after in described square three-way groove, and there is gap between the upper wall surface of square three-way groove and lower wall surface, and horizontal hunting can be done in this square three-way groove.The upper shell and lower house of described square three-way groove have the installing hole of cursor pin, after hydraulic action wound packages enters the square three-way groove of cursor, by cursor pin to hydraulic action cylinder location, and make between hydraulic action cylinder and cursor pin, to produce circumferential rotation.Cursor lower surface has the mating surface with turning cylinder locating surface.Through turning cylinder installing hole is had at described cursor and turning cylinder locating surface abutting end.The installing hole of the first fixture block is had outside described turning cylinder installing hole.
Upper surface and the cursor upper surface of described movable block are in same level.The upper surface of movable block has the installing hole of the second fixture block.2 alignment pins are installed in the middle part of the lower surface of movable block, by coordinating of this alignment pin and bar shaped groove on base, realize the adjustment of movable block position.
The method utilizing alloy plate material uneven pulling in-plane bending building mortion to bend alloy plate material that the present invention proposes, detailed process is:
The first step, tightens up alloy plate material clamping to be formed on the first fixture block and the second fixture block.
Second step, primer fluid press pump is treated shaping alloy plate material and is carried out first time bend tension.The frequency n of described bend tension is determined according to bending angle θ, as the angle of bend θ > 30 ° of alloy plate material to be formed, need repeatedly bending forming, when angle of bend θ≤30 ° of alloy plate material to be formed, direct bending forming.Specifically:
Under the thrust of hydraulic pump, cursor is rotated, thus stretching plate.The rotational angle that cursor rotates is 30 °.The maximum output pressure of hydraulic pump is 600kg/cm
2, hydraulic pump external part length is 55mm, and speed is 2mm/s.As follows by the relational expression of geometrical relationship known hydraulic pump external part length △ l and angle of bend θ:
In formula (1): a is that turning cylinder center is to cursor pin centre distance; B is that turning cylinder center is to pump housing frame pin centre distance; C is that cursor pin center is to pump housing frame pin centre distance; α is line and line angle between turning cylinder and pump housing frame pin between turning cylinder and cursor pin; △ l is hydraulic pump external part length; θ is angle of bend.
3rd step, after cursor rotates predetermined angular, closes hydraulic pump and timeliness 10min.Obtain the alloy plate material of first time bend tension shaping.
4th step, takes off the alloy plate material of bending forming from described in-plane bending building mortion, and whether the angle of bend measuring drawing zone meets the demands.
For the alloy plate material to be formed of angle of bend θ > 30 °, if meet the demands, then enter the 5th step second time bend tension; If the angle of bend of alloy plate material drawing zone does not meet the demands, then repeat the first step to the 3rd step and continue to mend and stretch, until the angle that alloy plate material bends reaches first time bending forming 30 ° of requiring.
For the alloy plate material to be formed of angle of bend θ≤30 °, if meet the demands, terminate the bending forming to this alloy plate material, obtain the alloy plate material of bending forming.If the angle of bend of alloy plate material drawing zone does not meet the demands, determine need benefit amount of tension, and repeat the first step to the 3rd step carry out benefits stretch, until alloy plate material bend angle meet bending forming requirement.
5th step, alloy plate material to be formed for angle of bend θ > 30 ° carries out alternating bending stretching, specifically, repeat the first step and carry out follow-up bend tension to the 3rd step, and the angle of bend of alloy plate material drawing zone after measuring each follow-up bend tension.If meet the demands, terminate the bending forming to this alloy plate material; If do not meet the demands, determine the benefit amount of tension needed, and carry out benefit stretching according to the 4th step, until the angle of bend of alloy plate material drawing zone meets the demands, obtain the alloy plate material of bending forming.
Described benefit amount of tension measures the angle obtained, and obtain hydraulic pump external part length under this angle by formula (1), under this angle described, the difference of hydraulic pump external part length and the hydraulic pump external part length corresponding to angle is required benefit amount of tension.
The present invention realizes the in-plane bending of alloy plate material under uneven pulling by a kind of easy building mortion: when to alloy plate material, local applies uneven pulling effect along its length, the radius of gyration utilizing mechanical rotation to realize plate upper limb is greater than the radius of gyration of lower edge, in rotation process, upper limb arc length recruitment is greater than the arc length recruitment of lower edge, plate upper limb and lower edge can produce the elongation of uneven distribution, utilize progressive molding principle that accumulation is carried out in this local deformation and coordination committee makes plastic bending deformation in plate generation face, and then to forming the future development of annulus, simultaneously owing to being interrupted loading procedure, can also be shaped the complicated shape part of different radian.
As shown in Figure 1.Plate is fixed by retained part by the present invention, then the rotation of mechanical device is utilized to realize alloy plate material local uneven pulling along its length, local deformation is carried out accumulation and coordination committee to make plate produce in-plane bending to be out of shape, and then to forming the future development of annulus.
The present invention uses for reference progressive molding principle, the rotation of mechanical device is utilized to realize alloy plate material local uneven pulling along its length and cumulative to this local elongation amount, and then to forming the future development of complicated shape of annulus or different radian, the cumulative forming limit that can give full play to each section of material of local elongation, when avoiding integrally stretching, local reaches limit of stretch and formability of materials that other positions also have larger stretching space to cause is not fully exerted problem, simultaneously, the present invention adopts the mode of stretching, stress distribution situation in plate face is different from the mode of compression, in plate, outskirt all becomes tension, principal stress is tension, and the existing compression of outskirt also has tension in compress mode, principal stress is compression, the present invention adopts the tension direction of stretching mode and plate to flow the consistent flowing contributing to material, principal direction of stress and the plate flow direction of compress mode are angled, cause the mode of plate mobility not as stretching.Can well solve that plate outer rim caused by the poor fluidity of the material in sheet metal deformation district is wrinkling, spatial warping and inner edge wrinkling, affect the problem such as the stability of forming process and the forming accuracy of part, be convenient to completing smoothly of technical process.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the manufacturing process that the present invention proposes.
Fig. 2 is that under stretching mode and compress mode, principal direction of stress and material flow direction contrast schematic diagram.Wherein a is principal direction of stress and material flow direction schematic diagram under the stretching mode that proposes of the present invention, and b is principal direction of stress and material flow direction schematic diagram under compress mode.
Fig. 3 is the structural representation of the building mortion proposed in the present invention.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the sectional view of hydraulic action cylinder and cursor coupling part.
Fig. 6 is the structural representation of base.
Fig. 7 is the structural representation of pump housing frame.
Fig. 8 is the structural representation of cursor.
Fig. 9 is the structural representation of hydraulic action cylinder.
Figure 10 is the partial sectional view of turning cylinder.
Figure 11 is the master map of movable block.
Figure 12 is the A-A sectional view of movable block.Wherein:
1. base, 2. pump housing frame, 3. cursor, 4. turning cylinder, 5. the first fixture block, 6. movable block, 7. the second fixture block, 8. cursor pin, 9. hydraulic action cylinder, 10. hydraulic pump, 11. pump housing frame pins, 12. plates.
Detailed description of the invention
Embodiment one
The present embodiment is for length 400mm, width 20mm, the device of the alloy plate material in-plane bending shaping of thickness 2mm, comprises the base 1 of building mortion, pump housing frame 2, cursor 3, turning cylinder 4, first fixture block 5, movable block 6, second fixture block 7, hydraulic action cylinder 9 and hydraulic pump 10.
Hydraulic pump 10 is arranged on the upper surface of described base 1, and the output shaft of described hydraulic pump 10 is set with hydraulic action cylinder 9, and the other end of hydraulic action cylinder 9 is positioned at the square through hole of cursor 3, and is fixed by cursor pin 8.The bottom of hydraulic pump 10 is fixed on base 1 by pump housing frame 2.Turning cylinder 4 is fixed on the upper surface of base 1.Cursor 3 is arranged on turning cylinder 4, and the locating surface on the lower surface that cursor 3 is coordinated with turning cylinder locating surface and turning cylinder 4 is fitted; Tightened up by hexagon slotted nut and pin.Movable block 6 is positioned at cursor 3 side, and the alignment pin of this movable block is arranged in the regulating tank of base 1, to adjust the position of movable block on base 1 according to tensile elongation.First fixture block 5 and the second fixture block 7 are arranged on the upper surface of cursor 3 and movable block 6 respectively, for compressing plate 12.
Base 1 is the carrier of the present embodiment.Base 1 is L-shaped, and its size is determined according to the rigging position of all parts and to the requirement of building mortion rigidity, and material is 45 steel.At base 1, movable block 6 place is installed, has the bar shaped groove of 72mm × 12mm to ensure the stroke of movable block.Base 1 has the installing hole of turning cylinder 4 and the fixing hole of pump housing frame 2.
Described pump housing frame 2 is rectangular block shape, has the fixed block of protrusion at a centre of surface of this pump housing frame, and there is the installing hole of pump housing frame pin 11 at the center of this fixed block.There is location-plate respectively in the both sides on described another surface of pump housing frame, the bottom of hydraulic pump 10 is placed between two location-plates, and realize the location to hydraulic pump 10 bottom by this location-plate.The size of pump housing frame 2 and pin is determined by the appearance and size of hydraulic pump and the rigidity requirement of normal rotation, and material is 45 steel, plays clamping hydraulic pump and provides rotating function.
Small-sized hand-operated pump CP-180 selected by described hydraulic pump 10, its parameter is as follows, operate maximum output pressure 600Kg/cm, adopt 1.2M high-pressure oil pipe, attached snap joint, use the superfine recycle oil of R32R or SHLLT-15, long 220mm, diameter 60mm, weight is 5Kg, because the square three-way groove restriction of cursor 3 makes the range of hydraulic pump in the present embodiment be 72mm.
Described hydraulic action cylinder 9 rigidity needed for hydraulic pump thrust part size and carrying thrust is determined, material is 45 steel, clamps the effect of hydraulic pump thrust part and provides rotating function.Hydraulic action cylinder 9 is revolving body, and its excircle is stepped.Wherein, there is blind hole at the larger diameter end center being positioned at one end, and the aperture of this blind hole is identical with the external diameter of hydraulic pump output shaft.Hydraulic action cylinder 9 reduced diameter section circumferential surface symmetry be processed into plane, be processed with through pin-and-hole on the plane, for installing cursor pin 8.The center line of described pin-and-hole and the center line of hydraulic action cylinder 9 are believed mutually vertical.In the present embodiment, the external diameter of hydraulic action cylinder larger diameter end is 59mm, and the external diameter of reduced diameter section is 40mm.
Described cursor 3 is rectangular block shape.The upper surface of cursor 3 is plane, is the installed surface of the first fixture block 5 and turning cylinder hexagon slotted nut, and the lower surface of cursor 3 is cascaded surface.The square three-way groove of this cursor both side surface through is had, for installing hydraulic action cylinder 9 in cursor 3 stepped end.The height of described square three-way groove is slightly larger than the height of reduced diameter section, the width of described square three-way groove is 2 times of the hydraulic action cylinder reduced diameter section external diameter coordinated with it, when the reduced diameter section of hydraulic action cylinder is arranged on after in described square three-way groove, and there is gap between the upper wall surface of square three-way groove and lower wall surface, and horizontal hunting can be done in square three-way groove.Upper shell and the lower house of described square three-way groove there is concentric through hole, and after hydraulic action cylinder 9 loads the square three-way groove of cursor 3, through hole on described square three-way groove is coaxial with the pin-and-hole on hydraulic action cylinder, by cursor pin 8 pairs of hydraulic action cylinder location, and make between hydraulic action cylinder and cursor pin, to produce circumferential rotation.The concave surface of cursor 3 other end is the mating surface with turning cylinder locating surface.Through turning cylinder installing hole is had at described cursor and turning cylinder locating surface abutting end.The installing hole of the first fixture block 5 is had outside described turning cylinder installing hole.Described cursor 3 and turning cylinder 4 coordinate and play the effect of stretching plate, and its size is determined by the size of hydraulic action cylinder and required rigidity, and material is 45 steel.
Described turning cylinder is revolving body, and the diameter of turning cylinder one end is greater than the diameter of turning cylinder axis body, makes its profile be "T"-shaped.There is screwed hole at the larger diameter end end face center of turning cylinder, for this turning cylinder being fixed on the upper surface of base.End face between turning cylinder larger diameter end and turning cylinder axis body is the locating surface of cursor, when cursor is set with on the rotating shaft, makes not interfere between the lower surface of cursor and base upper surface by described cursor locating surface.There is pin-and-hole at the other end of turning cylinder axis body, for installing alignment pin, by coordinating of this alignment pin and hexagon slotted nut, realizing the axial location to cursor.
Described first fixture block 5 and the second fixture block 7 are bulk.First fixture block 5 and the second fixture block 7 there is installation through hole respectively, for described first fixture block 5 and the second fixture block 7 being separately fixed at the upper surface of cursor 3 and movable block.Described first fixture block 5 is in square, and described second fixture block 7 is rectangular, makes the centre-to-centre spacing of installing hole on the second fixture block 7 be greater than the centre-to-centre spacing of installing hole on the first fixture block 5.
Described movable block 6 is block.Upper surface and the cursor upper surface of movable block 6 are in same level.The upper surface of movable block 6 has the installing hole of 4 the second fixture blocks 7.2 alignment pins are installed in the middle part of the lower surface of movable block 6, by coordinating of this alignment pin and bar shaped groove on base, realize the adjustment of movable block 6 position.
Embodiment two
The present embodiment uses bending alloy plate material of alloy plate material in-plane bending building mortion described in embodiment one.
Described alloy plate material length is 400mm, and width is 20mm, and thickness is the alloy plate material of 2mm, and bending angle is 60 °.From forming effect angle, each bending angle is unsuitable excessive, and the maximum angle of the in-plane bending of alloy plate material described in the present embodiment building mortion first order buckling is 30 °, therefore need carry out twice bending forming, and detailed process is:
The first step, tightens up alloy plate material clamping to be formed on the first fixture block 5 and the second fixture block 7.
Second step, primer fluid press pump carries out first time bend tension.Under the thrust of hydraulic pump, cursor is rotated, thus stretching plate.Set the rotational angle of cursor according to the angle of bend θ of alloy plate material to be formed, in the present embodiment, the rotational angle that cursor rotates is 30 °.The maximum output pressure of hydraulic pump is 600kg/cm
2, hydraulic pump external part length is 55mm, and speed is 2mm/s.
As follows by the relational expression of geometrical relationship known hydraulic pump external part length △ l and angle of bend θ:
In formula (1): a is that turning cylinder center is to cursor pin centre distance; B is that turning cylinder center is to pump housing frame pin centre distance; C is that cursor pin center is to pump housing frame pin centre distance; α is line and line angle between turning cylinder and pump housing frame pin between turning cylinder and cursor pin; △ l is hydraulic pump external part length; θ is angle of bend.
According to formula (1), in the present embodiment, the relational expression of hydraulic pump external part length △ l and angle of bend θ is as follows:
3rd step, after cursor rotates set angle, closes hydraulic pump and timeliness 10min.Obtain the alloy plate material of first time bend tension shaping.
4th step, takes off the alloy plate material of bending forming from described in-plane bending building mortion, and whether the angle of bend measuring drawing zone meets the demands.If meet the demands, then enter the 5th step and carry out second time bend tension; If the angle of bend of alloy plate material drawing zone does not meet the demands, determine the benefit amount of tension needed, and repeat the first step to the 3rd step and continue to mend and stretch, until the angle that alloy plate material bends reaches first time bending forming 30 ° of requiring.Described benefit amount of tension measures the angle obtained, and obtain hydraulic pump external part length under this angle by formula (1), under this angle described, the difference of hydraulic pump external part length and the hydraulic pump external part length corresponding to angle is required benefit amount of tension.In the present embodiment, substitute in formula (1) obtain hydraulic pump external part length under this angle by measuring the angle that obtains, ask to differ from the hydraulic pump external part length corresponding to 30 ° namely obtain mending amount of tension by obtaining under this angle hydraulic pump external part length.When after mending and stretching, the angle that alloy plate material bends reaches first time bending forming 30 ° of requiring, then enter the 5th step second time bend tension.
5th step, repeats the first step to the 3rd step and continues second time bend tension, and the angle of bend of alloy plate material drawing zone after measuring second time bend tension.If meet the demands, namely described angle of bend reaches 60 °, terminates the bending forming to this alloy plate material; If do not meet the demands, determine the benefit amount of tension needed, and according to mending the method for stretching described in the 4th step, benefit being carried out to alloy plate material and stretches, until the angle of bend of alloy plate material drawing zone meets the demands reach 60 °, obtaining the alloy plate material of bending forming.
Embodiment three
The present embodiment uses bending alloy plate material of alloy plate material in-plane bending building mortion described in embodiment one.
Described alloy plate material length is 400mm, and width is 20mm, and thickness is the alloy plate material of 2mm, and bending angle is 50 °.From forming effect angle, each bending angle is unsuitable excessive, and the maximum angle of the in-plane bending of alloy plate material described in the present embodiment building mortion first order buckling is 30 °, therefore need carry out bending forming at twice, wherein primary angle of bend is 30 °, and secondary angle of bend is 20 °.Detailed process is:
The first step, tightens up alloy plate material clamping to be formed on the first fixture block 5 and the second fixture block 7.
Second step, primer fluid press pump carries out first time bend tension.Under the thrust of hydraulic pump, cursor is rotated, thus stretching plate.When the rotational angle that cursor rotates is 30 °, hydraulic pump external part length is 55mm, and when the rotational angle that cursor rotates is 20 °, hydraulic pump external part length is 38mm, and speed is 2mm/s.
According to formula (1), in the present embodiment, the relational expression of hydraulic pump external part length △ l and angle of bend θ is as follows:
3rd step, after cursor rotates predetermined angular, closes hydraulic pump and timeliness 10min.Obtain the alloy plate material of first time bend tension shaping.
4th step, takes off the alloy plate material of bending forming from described in-plane bending building mortion, and whether the angle of bend measuring drawing zone meets the demands.If meet the demands, then enter the 5th step second time bend tension; If the angle of bend of alloy plate material drawing zone does not meet the demands, determine the benefit amount of tension needed, and repeat the first step to the 3rd step and continue to mend and stretch, until the angle that alloy plate material bends reaches first time bending forming 30 ° of requiring.Described benefit amount of tension measures the angle obtained, and obtain hydraulic pump external part length under this angle by formula (1), under this angle described, the difference of hydraulic pump external part length and the hydraulic pump external part length corresponding to angle is required benefit amount of tension.In the present embodiment, substitute in formula (1) obtain hydraulic pump external part length under this angle by measuring the angle that obtains, ask to differ from the hydraulic pump external part length corresponding to 30 ° namely obtain mending amount of tension by obtaining under this angle hydraulic pump external part length.When after mending and stretching, the angle that alloy plate material bends reaches first time bending forming 30 ° of requiring, then enter the 5th step second time bend tension.
5th step, repeats the first step to the 3rd step and continues second time bend tension, and the angle of bend of alloy plate material drawing zone after measuring second time bend tension.If meet the demands, namely described angle of bend reaches 50 °, terminates the bending forming to this alloy plate material; If do not meet the demands, determine the benefit amount of tension needed, and according to mending the method for stretching described in the 4th step, benefit being carried out to alloy plate material and stretches, until the angle of bend of alloy plate material drawing zone meets the demands reach 50 °, obtaining the alloy plate material of bending forming.
Embodiment four
The present embodiment uses bending alloy plate material of alloy plate material in-plane bending building mortion described in embodiment one.
Described alloy plate material length is 400mm, and width is 20mm, and thickness is the alloy plate material of 2mm, and bending angle is 20 °, can once complete.
The detailed process of the present embodiment is:
The first step, tightens up alloy plate material clamping to be formed on the first fixture block 5 and the second fixture block 7.
Second step, primer fluid press pump carries out first time bend tension.Under the thrust of hydraulic pump, cursor is rotated, thus stretching plate.When the rotational angle that cursor rotates is 20 °, hydraulic pump external part length is 38mm, and speed is 2mm/s.
According to formula (1), in the present embodiment, the relational expression of hydraulic pump external part length △ l and angle of bend θ is as follows:
3rd step, after cursor rotates predetermined angular, closes hydraulic pump and timeliness 10min.Obtain the alloy plate material of first time bend tension shaping.
4th step, takes off the alloy plate material of bending forming from described in-plane bending building mortion, and whether the angle of bend measuring drawing zone meets the demands.If meet the demands, namely described angle of bend reaches 20 °, terminates the bending forming to this alloy plate material; If the angle of bend of alloy plate material drawing zone does not meet the demands, determine the benefit amount of tension needed, and repeat the first step to the 3rd step and continue to mend and stretch, until the angle that alloy plate material bends reaches first time bending forming 20 ° of requiring.Described benefit amount of tension measures the angle obtained, and obtain hydraulic pump external part length under this angle by formula (1), under this angle described, the difference of hydraulic pump external part length and the hydraulic pump external part length corresponding to angle is required benefit amount of tension.In the present embodiment, substitute in formula (1) obtain hydraulic pump external part length under this angle by measuring the angle that obtains, ask to differ from the hydraulic pump external part length corresponding to 30 ° namely obtain mending amount of tension by obtaining under this angle hydraulic pump external part length.When after mending and stretching, the angle that alloy plate material bends reaches first time bending forming 20 ° of requiring, terminates the bending forming to this alloy plate material.
Claims (6)
1. an alloy plate material uneven pulling in-plane bending building mortion, is characterized in that, comprises base, pump housing frame, cursor, turning cylinder, the first fixture block, movable block, the second fixture block, hydraulic action cylinder and hydraulic pump; Hydraulic pump is arranged on the upper surface of described base, and hydraulic action jacket casing is contained on the output shaft of hydraulic pump, and the other end of described hydraulic action cylinder is connected with cursor; Cursor is installed on the rotating shaft, and the locating surface on the lower surface that cursor is coordinated with turning cylinder locating surface and turning cylinder is fitted; Movable block is positioned at cursor side, and the alignment pin of this movable block is arranged in the regulating tank of base, for adjusting the position of movable block on base according to tensile elongation; First fixture block and the second fixture block are arranged on the upper surface of cursor and movable block respectively, for compressing plate.
2. a kind of alloy plate material uneven pulling in-plane bending building mortion as claimed in claim 1, it is characterized in that, have the fixed block of protrusion at a centre of surface of pump housing frame, there is the installing hole of pump housing frame pin at the center of this fixed block; Have location-plate respectively in the both sides on another surface of pump housing frame, the bottom of hydraulic pump is placed between two location-plates, and realizes the location to hydraulic pump bottom by this location-plate.
3. a kind of alloy plate material uneven pulling in-plane bending building mortion as claimed in claim 1, it is characterized in that, the upper surface of cursor is the installed surface of the first fixture block and turning cylinder nut, and there is the square three-way groove for installing hydraulic action cylinder cursor one end; The height of described square three-way groove is slightly larger than the height of the smaller diameter end of hydraulic action cylinder, the width of described square three-way groove is 2 times of the hydraulic action cylinder reduced diameter section external diameter coordinated with it, when the smaller diameter end of hydraulic action cylinder is arranged on after in described square three-way groove, and there is gap between the upper wall surface of square three-way groove and lower wall surface, and horizontal hunting can be done in this square three-way groove; The upper shell and lower house of described square three-way groove have the installing hole of cursor pin, after hydraulic action wound packages enters the square three-way groove of cursor, by cursor pin to hydraulic action cylinder location, and make between hydraulic action cylinder and cursor pin, to produce circumferential rotation; Cursor lower surface has the mating surface with turning cylinder locating surface; Through turning cylinder installing hole is had at described cursor and turning cylinder locating surface abutting end; The installing hole of the first fixture block is had outside described turning cylinder installing hole.
4. a kind of alloy plate material uneven pulling in-plane bending building mortion as claimed in claim 1, it is characterized in that, upper surface and the cursor upper surface of described movable block are in same level; The upper surface of movable block has the installing hole of the second fixture block; 2 alignment pins are installed in the middle part of the lower surface of movable block, by coordinating of this alignment pin and bar shaped groove on base, realize the adjustment of movable block position.
5. utilize a kind of method that described in claim 1, alloy plate material uneven pulling in-plane bending building mortion bends alloy plate material, it is characterized in that, detailed process is:
The first step, tightens up alloy plate material clamping to be formed on the first fixture block and the second fixture block;
Second step, primer fluid press pump is treated shaping alloy plate material and is carried out first time bend tension; The frequency n of described bend tension is determined according to bending angle θ, as the angle of bend θ > 30 ° of alloy plate material to be formed, need repeatedly bending forming, when angle of bend θ≤30 ° of alloy plate material to be formed, direct bending forming; Specifically: the rotational angle setting cursor according to the angle of bend θ of alloy plate material to be formed, rotational angle≤30 ° of described cursor; Primer fluid press pump makes cursor rotate stretching plate; The maximum output pressure of hydraulic pump is 600kg/cm
2, hydraulic pump external part length is 55mm, and speed is 2mm/s;
As follows by the relational expression of geometrical relationship known hydraulic pump external part length Δ l and angle of bend θ:
In formula (1): a is that turning cylinder center is to cursor pin centre distance; B is that turning cylinder center is to pump housing frame pin centre distance; C is that cursor pin center is to pump housing frame pin centre distance; α is line and line angle between turning cylinder and pump housing frame pin between turning cylinder and cursor pin; Δ l is hydraulic pump external part length; θ is angle of bend;
3rd step, after cursor rotates set angle, closes hydraulic pump and timeliness 10min; Obtain the alloy plate material of first time bend tension shaping;
4th step, takes off the alloy plate material of bending forming from described in-plane bending building mortion, and whether the angle of bend measuring drawing zone meets the demands;
For the alloy plate material to be formed of angle of bend θ > 30 °, if meet the demands, then enter the 5th step and carry out follow-up bend tension; If the angle of bend of alloy plate material drawing zone does not meet the demands, then repeat the first step to the 3rd step and continue to mend stretching, until the angle that alloy plate material bends reaches the angle that bending forming for the first time requires;
For the alloy plate material to be formed of angle of bend θ≤30 °, if meet the demands, terminate the bending forming to this alloy plate material, obtain the alloy plate material of bending forming; If the angle of bend of alloy plate material drawing zone does not meet the demands, determine need benefit amount of tension, and repeat the first step to the 3rd step carry out benefits stretch, until alloy plate material bend angle meet bending forming requirement;
5th step, alloy plate material to be formed for angle of bend θ > 30 ° carries out follow-up alternating bending stretching, specifically, repeat the first step and carry out follow-up bend tension to the 3rd step, and the angle of bend of alloy plate material drawing zone after measuring each follow-up bend tension; If meet the demands, terminate the bending forming to this alloy plate material; If do not meet the demands, determine the benefit amount of tension needed, and carry out benefit stretching according to the 4th step, until the angle of bend of alloy plate material drawing zone meets the demands, obtain the alloy plate material of bending forming.
6. a kind of alloy plate material uneven pulling in-plane bending manufacturing process as claimed in claim 5, it is characterized in that, described benefit amount of tension measures the angle obtained, obtain hydraulic pump external part length under this angle by formula (1), under this angle described, the difference of hydraulic pump external part length and the hydraulic pump external part length corresponding to angle is required benefit amount of tension.
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| CN116037734B (en) * | 2022-08-09 | 2024-02-06 | 苏州联讯仪器股份有限公司 | Spring plate bending equipment and spring plate bending method |
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| JPH03248720A (en) * | 1990-02-27 | 1991-11-06 | Toyota Motor Corp | Intrasurface bending method |
| JP2007136527A (en) * | 2005-11-22 | 2007-06-07 | Nisshin Steel Co Ltd | Steel plate having excellent in-plane bendability, and plane bending method of steel plate |
| EP2123372B1 (en) * | 2008-05-21 | 2011-05-11 | BLM S.p.A. | Method for bending pipes, rods, profiled sections and similar blanks, and corresponding device |
| CN101722214B (en) * | 2008-10-27 | 2012-01-18 | 西北工业大学 | Roller adjusting mechanism of plate belt surface incurvation forming device and adjusting method thereof |
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