CN103350131B - The method of veneer reeling machine pressed-steel ladder rung - Google Patents

The method of veneer reeling machine pressed-steel ladder rung Download PDF

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Publication number
CN103350131B
CN103350131B CN201310292646.7A CN201310292646A CN103350131B CN 103350131 B CN103350131 B CN 103350131B CN 201310292646 A CN201310292646 A CN 201310292646A CN 103350131 B CN103350131 B CN 103350131B
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China
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fixed head
flitch
flanging
backing plate
reeling machine
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Expired - Fee Related
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CN201310292646.7A
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CN103350131A (en
Inventor
侯永强
黄顺彪
李建伟
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Sichuan No3 Electric Power Construction Co
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Sichuan No3 Electric Power Construction Co
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Abstract

This real disclosure of the invention method of a kind of veneer reeling machine pressed-steel ladder rung, the method can improve pressed-steel ladder rung quality, reduce steel ladder marks time corner angle.The method comprises the following steps: make the first fixed head, second fixed head, and be installed on backing plate, flitch to be installed on backing plate between the first fixed head and the second fixed head, the position of adjustment flitch, flitch and backing plate angulation α, then veneer reeling machine is sent into, the flanging of flitch is by bending angle α, take out flitch, flanging is vertically arranged on the first fixed head, between second fixed head, and add seben, flanging is clamped by the first fixed head and the second fixed head, again send into veneer reeling machine, second time bending is carried out to flitch, make flanging vertical with flitch, take out flitch, be that bending one end is arranged on backing plate by flitch, repeat above-mentioned steps, thus obtain the ladder rung of " N " or " Z " shaped steel.Adopt the method, artificial input can be reduced, increase work efficiency, save production cost.

Description

The method of veneer reeling machine pressed-steel ladder rung
Technical field
The invention of this reality relates to a kind of sheet material roll bending method, the method for especially a kind of veneer reeling machine pressed-steel ladder rung.
Background technology
Known: industrial building steel ladder is generally when project subject completes the middle and later periods, and on-the-spot need makes in a large number and install.It is the important component part of building steel ladder that steel ladder is marked time.According to the needs of each architectural engineering, steel ladder is marked time generally steel grating plate and checkered steel plate two kinds.Riffled iron ladder rung is in " Z " font or " N " font, and front and back of marking time are made up of the right angle of two band circular arcs.Riffled iron ladder rung is generally bent by scene after the blanking of employing checkered steel plate and forms.
In the process making riffled iron ladder rung, two traditional right angles bend and making way generally has: flower cut bend, steel plate combination welding, the method such as lever knuckle and jack compacting.But there is very large deficiency all respectively in quality and benefits in these methods: adopt flower to cut and bend, owing to only taking part to cut, cause cutting part to bend rear right angle without circular arc, Integral bending sample preparation formula disunity, quality technique is poor; Employing steel plate combination welds, and shapingly wholely marks time right angle all without circular arc afterwards, and corner angle are many, and the steel ladder of making is marked time quality existing defects; And adopt the method for lever knuckle or jack compacting, though all general inclined steel ladder that can reach is marked time quality technological requirement, it drops into, and manpower is many, labour intensity is also large, causes production work efficiency low.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of and improve pressed-steel ladder rung quality, reduce steel ladder and to mark time the method for veneer reeling machine pressed-steel ladder rung of corner angle.
The technical solution adopted for the present invention to solve the technical problems is: the method for veneer reeling machine pressed-steel ladder rung, comprises the following steps:
A, make the first fixed head, the second fixed head and backing plate;
B, by the first fixed head, the second fixed head is fixedly mounted on backing plate, has spacing between described first fixed head and the second fixed head; Be arranged on by flitch in the spacing that has between the first fixed head and the second fixed head, one end that flitch is positioned at spacing is flanging, and the end of described flanging contacts with the first fixed head, and the other end of flanging contacts with the second fixed head, and forms angle with backing plate; The length that flanging has is less than or equal to the height that the second fixed head has;
C, backing plate is arranged on veneer reeling machine; Described veneer reeling machine comprises the first winding up roller, the second winding up roller and the 3rd winding up roller; Backing plate is arranged on the second winding up roller and the 3rd winding up roller, and is positioned at below the first winding up roller;
D, startup veneer reeling machine, described second winding up roller and the 3rd winding up roller roll, and backing plate is moved to the first fixed head side, and described first winding up roller is suppressed flitch; Until by the flanging bending of flitch, the other end of flitch is pressed onto horizontal level, obtains horizontal ends;
E, stopping veneer reeling machine exiting backing plate, are vertically placed in the spacing between the first fixed head and the second fixed head by described flanging, and are close to the second fixed head, in spacing, place seben, make the first fixed head and the second fixed head clamp seben and flanging; The height that described seben has is less than or equal to the height that the second fixed head has;
F, backing plate is reinstalled on veneer reeling machine;
G, startup veneer reeling machine, described second winding up roller and the 3rd winding up roller roll, and backing plate is moved to the side of the first fixed head, and described first winding up roller carries out second time compacting to flitch; Until the horizontal ends of flitch is pressed onto horizontal level, flanging is vertical with flitch;
After H, second time have been suppressed, take out flitch and horizontal ends is arranged in spacing, bending is carried out to the horizontal ends of flitch, repeat step B to G, obtain compressing flitch.
Preferably, the first fixed head described in steps A and the second fixed head have identical fixed head height, and all adopt channel-section steel.
Further, the position that the end of the flanging described in step B contacts with the first fixed head arranges groove; By the end of the flanging of flitch and insertion groove in step C; The end in step H, flitch not being carried out the other end suppressed inserts groove.
Preferably, the angle described in step C is 45 °.
Preferably, the first fixed head described in step C and the second fixed head have identical fixed head length, flitch length≤fixed head length that described flitch has.
The invention has the beneficial effects as follows: the method for veneer reeling machine pressed-steel provided by the present invention ladder rung, the method installs flitch by arranging backing plate, adopts veneer reeling machine to suppress flitch.The steel ladder occurred in the methods such as the method adopting this kind of steel ladder processed to mark time can be avoided traditional flower to cut bending, steel plate combination welding, lever knuckle and jack compacting corner angle of marking time are many, bend pattern disunity, the problems such as quality technique difference.Steel ladder can be improved to mark time pressing process quality simultaneously, reduce steel ladder and to mark time corner angle, shorten steel ladder and mark time the press time, improve the compacting efficiency that steel ladder is marked time, reduce and manually drop into, reduce production cost.
Accompanying drawing explanation
Fig. 1 is backing plate by the structural representation on veneer reeling machine;
Fig. 2 is the structural representation of veneer reeling machine when suppressing flitch;
When Fig. 3 is completing steps E, flanging is vertically arranged on the structural representation on backing plate;
The structural representation of flitch and veneer reeling machine when Fig. 4 is completing steps G;
Flitch is reinstalled rear upper surface structural representation upwards in G step by Fig. 5;
Flitch is reinstalled rear lower surface structural representation upwards in G step by Fig. 6;
Fig. 7 is the partial enlarged drawing of A in Fig. 1;
Fig. 8 is fixed head and flitch length structure schematic diagram in embodiment;
Fig. 9 is structural representation when flitch one end has been suppressed in embodiment;
Indicate in figure: 1-veneer reeling machine, 11-first winding up roller, 12-second winding up roller, 13-the 3rd winding up roller, 21-first fixed head, 22-second fixed head, 23-groove, 3-flitch, 31-flanging, 32-horizontal ends, 4-backing plate, 5-seben, L1-flanging length, L2-fixed head length, L3-flitch length, α-angle, 61-upper surface, 62-lower surface.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figures 1 to 4, the method for veneer reeling machine pressed-steel ladder rung, comprises the following steps:
A, make two pieces of fixed heads and backing plate 4, fixed head comprises the first fixed head 21 and the second fixed head 22; B, the first fixed head 21, second fixed head 22 is fixedly mounted on backing plate 4, between described first fixed head 21 and the second fixed head 22, there is gap; Flitch 3 is arranged in the gap that has between the first fixed head 21 and the second fixed head 22, one end that flitch 3 is positioned at gap is flanging 31, the end of described flanging 31 contacts with the first fixed head 21, and the other end of flanging 1 contacts with the second fixed head 22, and forms angle α with backing plate 4; The length L1 that flanging 31 has is less than or equal to the height that the second fixed head 22 has; C, backing plate 4 is arranged on veneer reeling machine 1; Described veneer reeling machine 1 comprises the first winding up roller 11, second winding up roller 12 and the 3rd winding up roller 13; Backing plate 4 is arranged on the second winding up roller 12 and the 3rd winding up roller 13, and is positioned at below the first winding up roller 11; Described flitch 3 and the first winding up roller 11 tangent; D, startup veneer reeling machine 1, described second winding up roller 12 and the 3rd winding up roller 13 roll, and backing plate 4 is moved to the first fixed head 21 side, and described first winding up roller 11 pairs of flitch 3 are suppressed; Until by flanging 31 bending of flitch 3, the other end of flitch 3 is pressed onto horizontal level, obtains horizontal ends 32; E, stopping veneer reeling machine 1 exit backing plate 4, described flanging 31 is vertically placed in the gap between the first fixed head 21 and the second fixed head 22, and be close to the second fixed head 22, in gap, place seben 5, make the first fixed head 21 and the second fixed head 22 clamp seben 5 and flanging 31; The height that described seben 5 has is less than or equal to the height that the second fixed head 22 has; F, backing plate 4 is reinstalled on veneer reeling machine 1; G, startup veneer reeling machine 1, described second winding up roller 12 and the 3rd winding up roller 13 roll, and backing plate 4 is moved to the side of the first fixed head 21, and described first winding up roller 11 pairs of flitch 3 carry out second time compacting; Until the horizontal ends 32 of flitch 3 is pressed onto horizontal level, flanging 31 is vertical with flitch 3; After H, second time have been suppressed, one end that flitch 3 is not suppressed is arranged in the gap between the first fixed head 21 and the second fixed head 22 and carries out bending by taking-up flitch 3, repeats step B to G, obtains compressing flitch 3.
First the first fixed head 21, second fixed head 22 and backing plate 4 is made in step, for the installation of flitch 3 is ready.In stepb flitch 3 is installed on backing plate 4, simultaneously flitch 3 is arranged in the gap that has between the first fixed head 21 and the second fixed head 22, one end that flitch 3 is positioned at gap is flanging 31, the end of described flanging 31 contacts with the first fixed head 21, the other end of flanging 1 contacts with the second fixed head 22, and forms angle α with backing plate 4.The length L1 that flanging 31 has is less than or equal to the height that the second fixed head 22 has; Thus ensure that the flanging 31 of flitch 3 can by abundant bending, flanging 31 can bending to the position vertical with flitch 3.If the length L1 of flanging 31 is greater than the height of the second fixed head 22, flanging 31 cannot by bending to the position vertical with flitch 3.Therefore be that flitch 3 is sent into veneer reeling machine 1 to carry out compacting ready by step B.First be installed on veneer reeling machine 1 by flitch 3 and backing plate 4 in step C neutralization procedure D, then suppressed by veneer reeling machine 1 pair of flitch, make the flanging 31 of flitch 3 by bending, bending angle is α.Readjust in step e by the position in the gap of the first fixed head 21 and the second fixed head 22 of flitch after bending 3 flanging 31, flanging 31 is vertically placed.Place seben 5 simultaneously, make the first fixed head 21 and the second fixed head 22 clamp flanging 31 and seben 5.Position flitch 3 will be adjusted and backing plate 4 reinstalls on veneer reeling machine 1 in step F.In step G, second time compacting is carried out to mounted flitch 3 again, make flanging 31 by bending to the position vertical with flitch 3.In H step, one end that flitch 3 is not suppressed is arranged in the gap between the first fixed head 21 and the second fixed head 22 and carries out bending, repeat step B to G, obtain compressing flitch 3.In steph, as shown in Figure 5, if flitch 3 install fixing after, the upper surface 61 of flitch 3 upwards, then mark time as " N " font by the steel ladder suppressed; As shown in Figure 6, if flitch 3 install fixing after, the steel ladder that the lower surface of flitch 3 upwards then suppresses is marked time as " Z " font.As shown in Figure 1, when the upper surface 61 of flitch 3 refers to and is arranged on backing plate 4 by flitch 3 in stepb, on flitch 3, face is upwards the upper surface 61 of flitch 3, and downward face is lower surface 62.
Adopt the method for above-mentioned veneer reeling machine pressed-steel ladder rung, can avoid adopting flower to cut bending method, owing to only taking part to cut, cause cutting part to bend rear right angle without circular arc, Integral bending sample preparation formula disunity, the shortcoming that quality technique is poor.Also can avoid adopting steel plate combination welding, shapingly wholely mark time right angle all without circular arc, the shortcoming that corner angle are many afterwards; Can also avoid the method adopting lever knuckle or jack compacting, though all steel ladder is marked time and can be reached steel plate and to mark time quality technological requirement, it drops into, and manpower is many, labour intensity is also large, causes the inefficient shortcoming of production work simultaneously.The method is adopted to carry out compacting bending by veneer reeling machine 1 pair of flitch 3, bending is carried out to flitch 3 owing to adopting machine thus artificial input can be reduced, increase work efficiency, simultaneously because flitch 3 is fixed by the first fixed head 21 and the second fixed head 22 on backing plate 4, each flanging 31 measure-alike, therefore also can ensure the compressing rear quality technological requirement meeting steel ladder and mark time of flitch 3, can ensure that flitch 3 Integral bending sample preparation formula is identical.
Simple in order to make the first fixed head 21 and the second fixed head make, reduce cost of manufacture.First fixed head 21 and the second fixed head 22 can have multiple choices, channel-section steel, iron block etc.Wherein preferred embodiment has an identical fixed head height h for the first fixed head 21 described in steps A and the second fixed head 22, and all adopts channel-section steel.First fixed head 21 and the second fixed head 22 adopt channel-section steel and have identical fixed head height h, can carry out blanking in the process made on same channel-section steel.The waste of channel-section steel can be reduced.Make simultaneously making first fixed head 21 and the second fixed head 22 simple and easy, simultaneously channel-section steel easily obtains, and cost is lower, and just to comparatively large not easily damaged, long service life, ensure that the repeatedly compacting precision of flitch 3, reduce cost of manufacture.
In order to adjust the length of flanging 31, make flitch 3 not easily skid off from gap in the process of compacting simultaneously.The position that the end of the flanging 31 described in step B contacts with the first fixed head 21 arranges groove 23; By the end of the flanging 31 of flitch 3 and insertion groove 23 in step C; The end in step H, flitch 3 not being carried out the other end suppressed inserts groove 23.As shown in Figure 7, the spacing in gap is a, and groove 23 is b apart from the distance of the first fixed head 21 upper surface, and length L1 and a of flanging 31 and b forms a right angled triangle, therefore the spacing a between the first fixed head 21 and the second fixed head 22 is regulated just can to adjust flanging length L1.Arrange groove 23, in step C, the end of the flanging 31 of flitch 3 inserts groove 23 simultaneously, and in step H, flitch 3 does not suppress the end insertion groove 23 of one end.Thus ensure that the length of each flanging 31 is consistent, ensure that compacting quality technique.
Flitch 3 after being installed on backing plate 4 and backing plate 4 form angle α, angle α is acute angle.Wherein preferred embodiment for the angle α described in step C, α be 45 °.Flitch 3 and the angle α of backing plate 4, determine first time carries out bending bending angle to flitch 3.Bending angle is equal with the angle α of backing plate 4 with flitch 3.Because final flitch 3 is bent into flanging 31 and flitch 3 body normal of flitch 3 after type.Therefore when α is 45 °, flanging 31 first time bending angle is 45 °, carries out second time compacting bending angle and is also 45 °.Therefore ensure that the bending angle of twice compacting is identical, thus be conducive to simplifying the operation, be conducive to control operation.
In the process flitch 3 once suppressed, laterally fully by bending, fold can not be caused in order to make flitch 3.The first fixed head 21 described in step C and the second fixed head 22 have identical fixed head length L2, the flitch length L3 that described flitch 3 has≤fixed head length L2.Due to flitch length L3≤fixed head length L2, therefore can ensure that flanging 3 entirety of flitch 3 is between the first fixed head 21 and the gap of the second fixed head 22.Under the supporting role of the second fixed head 22, flitch 3 transverse integral is by bending.Thus flitch 3 disposable bending along its length can be ensured.
Flitch 3 can be the steel plate of various ways, and the steel plate that common plane is smooth, checkered steel plate etc., wherein a kind of preferred embodiment is that flitch 3 adopts checkered steel plate.Because checkered steel plate has protruding pattern pattern in its surface, therefore surface of steel plate out-of-flatness, will form larger frictional force with during object contact, uses can play anti-skidding effect as steel ladder pedal.
Backing plate 4 can be various ways, plank, steel plate etc.Wherein preferred embodiment is that backing plate 4 adopts a steel plate, and because armor plate strength is comparatively large, steel plate is high temperature resistant.Therefore backing plate 4 adopts steel plate, and can ensure that the life cycle of backing plate 4 is longer, service life is longer.
Embodiment
Carry out to flitch 3 steel ladder that bending obtains " N " font according to following steps to mark time, flitch 3 adopts checkered steel plate.
A, make two pieces of fixed heads and backing plate 4, fixed head comprises the first fixed head 21 and the second fixed head 22.The first described fixed head 21 and the second fixed head 22 have identical fixed head height h, and all adopt channel-section steel.
B, the first fixed head 21, second fixed head 22 is fixedly mounted on backing plate 4, between described first fixed head 21 and the second fixed head 22, there is gap; The first described fixed head 21 and the second fixed head 22 have identical fixed head length L3, flitch 3 is arranged in the gap that has between the first fixed head 21 and the second fixed head 22, the flitch length L3 that described flitch 3 has≤fixed head length L2, one end that flitch 3 is positioned at gap is flanging 31, the end of described flanging 31 contacts with the first fixed head 21, the other end of flanging 1 contacts with the second fixed head 22, and forms angle α with backing plate 4; The flanging length L1 that flanging 31 has is less than or equal to the height that the second fixed head 22 has; The first described fixed head 21 and the second fixed head 22 have gap, formed gap two medial surfaces in the first fixed head 21 side on be provided with groove 23.
C, the backing plate 4 being provided with the first fixed head 21, second fixed head 22 and flitch 3 is arranged on veneer reeling machine 1; Described veneer reeling machine 1 comprises the first winding up roller 11, second winding up roller 12 and the 3rd winding up roller 13; Backing plate 4 is arranged on the second winding up roller 12 and the 3rd winding up roller 13, and is positioned at below the first winding up roller 11; Described flitch 3 and the first winding up roller 11 tangent.The end of the flanging 31 of flitch 3 and groove 23 adaptation.
D, startup veneer reeling machine 1, described second winding up roller 12 and the 3rd winding up roller 13 roll, and backing plate 4 is moved to the first fixed head 21 side, and described first winding up roller 11 pairs of flitch 3 are suppressed; Until by flanging 31 bending of flitch 3, the other end of flitch 3 is pressed onto horizontal level, obtains horizontal ends 32.
E, stopping veneer reeling machine 1 exit backing plate 4, described flanging 31 is vertically placed in the gap between the first fixed head 21 and the second fixed head 22, and be close to the second fixed head 22, in gap, place seben 5, make the first fixed head 21 and the second fixed head 22 clamp seben 5 and flanging 31; The height that described seben 5 has is less than or equal to the fixed head height h that the second fixed head 22 has.
F, the backing plate 4 installing flitch 3, seben 5, first fixed head 21 and the second fixed head 22 to be reinstalled on veneer reeling machine 1.
G, startup veneer reeling machine 1, described second winding up roller 12 and the 3rd winding up roller 13 roll, and backing plate 4 is moved to the side of the first fixed head 21, and described first winding up roller 11 pairs of flitch 3 carry out second time compacting; Until the horizontal ends 32 of flitch 3 is pressed onto horizontal level, flanging 31 is vertical with flitch 3.
After H, second time suppresss, the other end that flitch 3 does not carry out suppressing is arranged on to have in gap between the first fixed head 21 and the second fixed head 22 and carries out bending by taking-up flitch 3, and the upper surface 61 of flitch 3 upwards; Repeat step B to G, obtain compressing " N " font flitch 3.
By the method for above-mentioned veneer reeling machine pressed-steel ladder rung, steel ladder flitch 3 being bent into " N " font is marked time, and because flitch 3 adopts checkered steel plate, therefore steel ladder is marked time good antiskid effect.The method adopts veneer reeling machine to carry out bending to flitch 3 simultaneously, and in Forging Process, flitch is an entirety, and flanging 31 and flitch 3 seamlessly transit, and therefore right angle can self-assembling formation circular arc.On the first fixed head 21 of fixing flitch 3, be provided with groove, the end of fixing flanging 31 simultaneously, thus the measure-alike of each bending flanging 31 can be ensured, ensure that the quality technique that steel ladder is marked time.Owing to adopting veneer reeling machine 1 pair of flitch 3 to carry out bending, thus decrease artificial input, improve operating efficiency, saved production cost.

Claims (6)

1. the method for veneer reeling machine pressed-steel ladder rung, is characterized in that, comprises the following steps:
A, make the first fixed head (21), the second fixed head (22) and backing plate (4);
B, the first fixed head (21), the second fixed head (22) are fixedly mounted on backing plate (4), between described first fixed head (21) and the second fixed head (22), there is gap; Flitch (3) is arranged in the gap had between the first fixed head (21) and the second fixed head (22), one end that flitch (3) is positioned at gap is flanging (31), the end of described flanging (31) contacts with the first fixed head (21), the other end of flanging (1) contacts with the second fixed head (22), and forms angle (α) with backing plate (4); The flanging length (L1) that flanging (31) has is less than or equal to the height that the second fixed head (22) has; The position that the end of described flanging (31) contacts with the first fixed head (21) arranges groove (23);
C, by the end of the flanging (31) of flitch (3) insert groove (23); Backing plate (4) is arranged on veneer reeling machine (1); Described veneer reeling machine (1) comprises the first winding up roller (11), the second winding up roller (12) and the 3rd winding up roller (13); Backing plate (4) is arranged on the second winding up roller (12) and the 3rd winding up roller (13), and is positioned at the first winding up roller (11) below;
D, startup veneer reeling machine (1), described second winding up roller (12) and the 3rd winding up roller (13) roll, backing plate (4) is moved to the first fixed head (21) side, and described first winding up roller (11) is suppressed flitch (3); Until by flanging (31) bending of flitch (3), the other end of flitch (3) is pressed onto horizontal level, obtain horizontal ends (32);
Backing plate (4) is exited in E, stopping veneer reeling machine (1), described flanging (31) is vertically placed in the gap between the first fixed head (21) and the second fixed head (22), and be close to the second fixed head (22), in gap, place seben (5), make the first fixed head (21) and the second fixed head (22) clamp seben (5) and flanging (31); The height that described seben (5) has is less than or equal to the height that the second fixed head (22) has;
F, backing plate (4) is reinstalled on veneer reeling machine (1);
G, startup veneer reeling machine (1), described second winding up roller (12) and the 3rd winding up roller (13) roll, backing plate (4) is moved to the side of the first fixed head (21), and described first winding up roller (11) carries out second time compacting to flitch (3); Until the horizontal ends (32) of flitch (3) is pressed onto horizontal level, flanging (31) is vertical with flitch (3);
After H, second time have been suppressed, taking out flitch (3) is arranged in the gap between the first fixed head (21) and the second fixed head (22) by the other end that flitch (3) does not carry out suppressing, and end flitch (3) not being carried out the other end suppressed inserts groove (23) and carries out bending; Repeat step B to G, obtain compressing flitch (3).
2. the method for veneer reeling machine pressed-steel ladder rung as claimed in claim 1, it is characterized in that: the first fixed head (21) described in steps A and the second fixed head (22) have identical fixed head height (h), and all adopt channel-section steel.
3. the method for veneer reeling machine pressed-steel ladder rung as claimed in claim 1, is characterized in that: the angle (α) described in step B is 45 °.
4. the method for veneer reeling machine pressed-steel ladder rung as claimed in claim 1, it is characterized in that: the first fixed head (21) described in step B and the second fixed head (22) have identical fixed head length (L2), the flitch length (L3) that described flitch (3) has≤fixed head length (L2).
5. the method for the veneer reeling machine pressed-steel ladder rung as described in Claims 1-4 any one claim, is characterized in that: described flitch (3) adopts checkered steel plate.
6. the method for the veneer reeling machine pressed-steel ladder rung as described in Claims 1-4 any one claim, is characterized in that: described backing plate (4) adopts steel plate.
CN201310292646.7A 2013-07-12 2013-07-12 The method of veneer reeling machine pressed-steel ladder rung Expired - Fee Related CN103350131B (en)

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CN1840285A (en) * 2005-03-30 2006-10-04 联想(北京)有限公司 Bent machining method for metal plate
CN101307631A (en) * 2008-06-19 2008-11-19 武汉冶建安装工程有限责任公司 Method for manufacturing stair step plate utilizing roll bending machine
CN101947577A (en) * 2010-08-25 2011-01-19 中国一冶集团有限公司 Method for bending component by bending machine

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