CA2080032A1 - Method to make bends in the trailing ends of bars for building work in bending-shaping machines, and bending-shaping machines for bars for building work which employ such method - Google Patents
Method to make bends in the trailing ends of bars for building work in bending-shaping machines, and bending-shaping machines for bars for building work which employ such methodInfo
- Publication number
- CA2080032A1 CA2080032A1 CA002080032A CA2080032A CA2080032A1 CA 2080032 A1 CA2080032 A1 CA 2080032A1 CA 002080032 A CA002080032 A CA 002080032A CA 2080032 A CA2080032 A CA 2080032A CA 2080032 A1 CA2080032 A1 CA 2080032A1
- Authority
- CA
- Canada
- Prior art keywords
- bending
- bar
- assembly
- bars
- building work
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007493 shaping process Methods 0.000 title claims abstract description 17
- 238000005452 bending Methods 0.000 claims abstract description 49
- 238000010008 shearing Methods 0.000 claims abstract description 14
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 238000009472 formulation Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 101150012763 endA gene Proteins 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
- B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Wire Processing (AREA)
Abstract
ABSTRACT
Method to make bends in the trailing ends of bars for building work in bending-shaping machines which comprise in working sequence a drawing and/or straightening assembly (11), a shearing assembly (16), a bending assembly (12) and clamping means (17-117), which have a first retracted position under the working plane and a second working position, the bars for building work being obtained from a bar (10) coming from a feeding section (22) possibly wound in a roll, the bar (10) with all its bends already made except a bend (24) in its trailing end being separated from the feeding section (22) and being fed forwards downstream by a required length, the bend (24) in its trailing end being then carried out in cooperation with the clamping means (17-117).
sending-shaping machine for bars for building work, which comprises in working sequence a drawing and/or straightening assembly (11), a shearing assembly (16), a bending assembly (12) and clamping means (17-117), which have a first retracted position under the working plane and a second working position, the bars for building work being obtained from a bar (10) coming from a feeding section (22) possibly wound in a roll, the machine comprising means for the controlled forward displacement (11-12) of the feeding section (22) partly pre-shaped and sheared to a required length.
Method to make bends in the trailing ends of bars for building work in bending-shaping machines which comprise in working sequence a drawing and/or straightening assembly (11), a shearing assembly (16), a bending assembly (12) and clamping means (17-117), which have a first retracted position under the working plane and a second working position, the bars for building work being obtained from a bar (10) coming from a feeding section (22) possibly wound in a roll, the bar (10) with all its bends already made except a bend (24) in its trailing end being separated from the feeding section (22) and being fed forwards downstream by a required length, the bend (24) in its trailing end being then carried out in cooperation with the clamping means (17-117).
sending-shaping machine for bars for building work, which comprises in working sequence a drawing and/or straightening assembly (11), a shearing assembly (16), a bending assembly (12) and clamping means (17-117), which have a first retracted position under the working plane and a second working position, the bars for building work being obtained from a bar (10) coming from a feeding section (22) possibly wound in a roll, the machine comprising means for the controlled forward displacement (11-12) of the feeding section (22) partly pre-shaped and sheared to a required length.
Description
- 1- 2~0~
"METEIOD TO MA}CE BENDS IN ~H15 TRAILING ENDS OF BARS
"METEIOD TO MA}CE BENDS IN ~H15 TRAILING ENDS OF BARS
2 FOR BUILDING WORR IN BENDING-SHAPING MACEIINES, AND
3 BENDING-SHAPING MACHINES FOR BARS FO~ BUILDING WORK
4 WHICH EMPLOY SUCH METHOD"
S * * ~ * *
6 This invention concerns a method to make bends in the 7 trailing ends of bars for building work in bending-shaping 8 machines and concerns also bending-shaping machines for bars 9 for building work which employ such method, as set forth in the relative main claims.
11 The method of this invention to make bends in the trailing 12 ends is applied properly to the field of processing sections 13 for reinforcements in reinforced concrete, the sections 19 being in the form of bars or rolls of a round, square, polygonal or other cross sectlon.
16 The bendlng-shaping machines of the state of the art which 17 are characterlzed by having one single bending assembly 18 downstream of a shearing assembly and of a straightening-l9 drawing assembly~ or a drawing assembly alone~ entail the problem Of making bends in the trailing end of the bar.
21 With these known bendlng-shaping machines it is not 22 possible to make bends in the trailing end except where the 23 length between the shearing plane and the axis of the 29 abutment roll coincides with the required length of the bend in the trailing end. This fact reStriCtS the oUtpUt Of the 26 bending machines Of the state of the art considerably.
2~ Document IT-B-1024229 discloses a teaching of making the 2B bend in the traillng end, lowering the bending assembly and 29 bringing the section back to the required length before per~orming the shearing. This system entails long 31 processing times and lowering and raiSing mechanisms whiCh 32 by their use involve great consumptions of energy and 33 problems of wear and maintenance.
- 2 - 2 0 8 0 ~ ~ r~
1 Document IT 83349 A/89 discloses a proposal to arrange the 2 shears assembly separately above the bending assembly, but 3 this proposal entails the problem of shearing the trailing 4 end where the trailing end is long.
Documents IT 83543 A/9O and EP-A-0.379.043 disclose a 6 bending~shaping machine which comprises a retractable 7 drawing assembly located downstream of the bending assembly.
8 This retractable drawing assembly enables the section to be 9 clamped and, after the shearing operation, to be drawn downstream by a desired length so that the bend in the 11 trailing end can then be made. This teaching is in itself 12 interesting and useful but involves problems of overall bulk 13 and of moving the drawing assembly, with resulting problems 14 of wasted energy, maintenanCe/ wasted materials and a 15 complex Structure.
16 Document DE-A-1.249.057 teaches a complex sy~tem for 17 expanding the abutment roll for as to clamp the bar. This 18 system cannot be applied to bending/shaping machines which 19 produce up to 1500/1600 9tirrUpS an hour because it has a very short life and is complex to handle.
21 Document DE-A-1.920.668 teaches the thrusting oi a bar 22 with an appropriate jack, but this teaching cannot be 23 applied to bending/shaping machines owing to the high 2~ working speed, the need for simplicity and the necessity of not having any contacts during the travel Of the bar.
26 EP-A-0.371.960 teaches the uSe Of the bending pin Of an 27 end-bending assembly to clamp the bar while the other 28 bending assemblies are positioned.
29 The present applicants have studied, tested and obtained this invention to obviate the shortcomings of the state of 31 the art and to achieve further advantages.
32 This invention iS set forth and characterized in the 33 relative main claims, while the dependent claims describe -- 3 2 0 8 ~ V ~ r ~
l variants of the idea of the main solution.
2 The lnvention consists in providing a normal bending-3 shaping machine for bars for building work and also a method 4 which enables bends to be made in the trailing end of bars for building work, even when the end segment of the bent bar 6 has a length different from the distance between the 7 shearing plane and the axis of the abutment roll of the ~8 bending assembly.
9 A first formulation of the method to make bends in the trailing end of bars according to the invention provides 11 that, after all the bends have been made except the bend in 12 the trailing end and after shearing to size has taken place 13 and has separated the bent bar from the feeding section, the 14 bar is thrust downstream by the distance requlred by the feeding actlon of the feeding section.
16 When the feeding section has thrust the bent bar 17 downstream by the distance required~ the feeding section 18 moves back to its Starting poSition and the bend iS made in 19 the trailing end Of the bar.
Thls first formulatlon includes clamplng means or abutment 21 means or other means suitable for the purpose which are 22 positioned downstream of the bending assembly so as to hold 23 the bar rigidly in poSition during the aforesaid step Of 24 making the bend in the trailing end of the bar.
25 These clampin~ means or abutment means or other means 26 suitable for the purpose can be retracted below the working 27 plane so as to enable the preceding bends to be made in the 28 bar.
29 A second formulation of the method to make bends in the trailing end Of the bar according to the invention provides 31 that the bending assembly can move parallel to the axis of 32 feed of the bar.
33 This motion of feed is achieved, for instance, by slider - 4 - 20g ~^3,'~
1 means able to move on suitable guides, the bending assembly 2 being positioned on these slider means.
3 According to this second formulation, after all the bends 4 have been made except the bend in the trailing end of the bar and after the shearing of the bent bar to size has taken 6 place and the bent bar has been separated from the feeding 7 section, the bending assembly is rotated by an amount enough 8 to clamp the bar by bending the same~ and the bar will abut 9 against a third retractable pointi the bending assembly is then moved forwards downstream until it has displaced the 11 bent bar by the required distance.
12 The bending assembly then releases the bent bar, which is 13 clamped by an appropriate retractable assembly and is 14 brought back upstream by a required value~ at which ~he bend in the trailing end o~ the bar i~ made.
16 The attached figures, whlch are given as a non-restrlctive 17 example, show two variants of the invention as follows:-18 Figs . la~ lb and lc show a cycle of making a bend in the 19 trailing end according to a first formulation of thiS invention;
21 Figs.2a, 2b, 2c, 2d, 2e and 2f show a cycle of making a bend 22 in the trailing end according to a second 23 formulation of this invention.
24 Figs.1 show a cycle of making a bend in the trailing end of a bar according to a first formulation of the method of 26 this invention.
27 Fig.la shows a bar 10 coming in this example from a wound28 roll, the bar 10 having undergone all the bending operations 29 except that of its trailing end; for the sake of simplicity the bends made consist here of one single bend 23, which in 31 this case is a hook in the leading end of the bar 10.
32 The displacements of the bar 10 along the working plane 33 are brought about by a drawing assembly 11 located upstream ~Q80~
1 of a bending assembly 12.
2 The drawing assembly 11 may comprise also a straightening 3 assembly or may consist of a straightening assembly alone.
4 The drawing assembly 11 and bending assembly 12 form part 5 of the state of the art and are therefore unimportant for 6 the purposes of the invention.
S * * ~ * *
6 This invention concerns a method to make bends in the 7 trailing ends of bars for building work in bending-shaping 8 machines and concerns also bending-shaping machines for bars 9 for building work which employ such method, as set forth in the relative main claims.
11 The method of this invention to make bends in the trailing 12 ends is applied properly to the field of processing sections 13 for reinforcements in reinforced concrete, the sections 19 being in the form of bars or rolls of a round, square, polygonal or other cross sectlon.
16 The bendlng-shaping machines of the state of the art which 17 are characterlzed by having one single bending assembly 18 downstream of a shearing assembly and of a straightening-l9 drawing assembly~ or a drawing assembly alone~ entail the problem Of making bends in the trailing end of the bar.
21 With these known bendlng-shaping machines it is not 22 possible to make bends in the trailing end except where the 23 length between the shearing plane and the axis of the 29 abutment roll coincides with the required length of the bend in the trailing end. This fact reStriCtS the oUtpUt Of the 26 bending machines Of the state of the art considerably.
2~ Document IT-B-1024229 discloses a teaching of making the 2B bend in the traillng end, lowering the bending assembly and 29 bringing the section back to the required length before per~orming the shearing. This system entails long 31 processing times and lowering and raiSing mechanisms whiCh 32 by their use involve great consumptions of energy and 33 problems of wear and maintenance.
- 2 - 2 0 8 0 ~ ~ r~
1 Document IT 83349 A/89 discloses a proposal to arrange the 2 shears assembly separately above the bending assembly, but 3 this proposal entails the problem of shearing the trailing 4 end where the trailing end is long.
Documents IT 83543 A/9O and EP-A-0.379.043 disclose a 6 bending~shaping machine which comprises a retractable 7 drawing assembly located downstream of the bending assembly.
8 This retractable drawing assembly enables the section to be 9 clamped and, after the shearing operation, to be drawn downstream by a desired length so that the bend in the 11 trailing end can then be made. This teaching is in itself 12 interesting and useful but involves problems of overall bulk 13 and of moving the drawing assembly, with resulting problems 14 of wasted energy, maintenanCe/ wasted materials and a 15 complex Structure.
16 Document DE-A-1.249.057 teaches a complex sy~tem for 17 expanding the abutment roll for as to clamp the bar. This 18 system cannot be applied to bending/shaping machines which 19 produce up to 1500/1600 9tirrUpS an hour because it has a very short life and is complex to handle.
21 Document DE-A-1.920.668 teaches the thrusting oi a bar 22 with an appropriate jack, but this teaching cannot be 23 applied to bending/shaping machines owing to the high 2~ working speed, the need for simplicity and the necessity of not having any contacts during the travel Of the bar.
26 EP-A-0.371.960 teaches the uSe Of the bending pin Of an 27 end-bending assembly to clamp the bar while the other 28 bending assemblies are positioned.
29 The present applicants have studied, tested and obtained this invention to obviate the shortcomings of the state of 31 the art and to achieve further advantages.
32 This invention iS set forth and characterized in the 33 relative main claims, while the dependent claims describe -- 3 2 0 8 ~ V ~ r ~
l variants of the idea of the main solution.
2 The lnvention consists in providing a normal bending-3 shaping machine for bars for building work and also a method 4 which enables bends to be made in the trailing end of bars for building work, even when the end segment of the bent bar 6 has a length different from the distance between the 7 shearing plane and the axis of the abutment roll of the ~8 bending assembly.
9 A first formulation of the method to make bends in the trailing end of bars according to the invention provides 11 that, after all the bends have been made except the bend in 12 the trailing end and after shearing to size has taken place 13 and has separated the bent bar from the feeding section, the 14 bar is thrust downstream by the distance requlred by the feeding actlon of the feeding section.
16 When the feeding section has thrust the bent bar 17 downstream by the distance required~ the feeding section 18 moves back to its Starting poSition and the bend iS made in 19 the trailing end Of the bar.
Thls first formulatlon includes clamplng means or abutment 21 means or other means suitable for the purpose which are 22 positioned downstream of the bending assembly so as to hold 23 the bar rigidly in poSition during the aforesaid step Of 24 making the bend in the trailing end of the bar.
25 These clampin~ means or abutment means or other means 26 suitable for the purpose can be retracted below the working 27 plane so as to enable the preceding bends to be made in the 28 bar.
29 A second formulation of the method to make bends in the trailing end Of the bar according to the invention provides 31 that the bending assembly can move parallel to the axis of 32 feed of the bar.
33 This motion of feed is achieved, for instance, by slider - 4 - 20g ~^3,'~
1 means able to move on suitable guides, the bending assembly 2 being positioned on these slider means.
3 According to this second formulation, after all the bends 4 have been made except the bend in the trailing end of the bar and after the shearing of the bent bar to size has taken 6 place and the bent bar has been separated from the feeding 7 section, the bending assembly is rotated by an amount enough 8 to clamp the bar by bending the same~ and the bar will abut 9 against a third retractable pointi the bending assembly is then moved forwards downstream until it has displaced the 11 bent bar by the required distance.
12 The bending assembly then releases the bent bar, which is 13 clamped by an appropriate retractable assembly and is 14 brought back upstream by a required value~ at which ~he bend in the trailing end o~ the bar i~ made.
16 The attached figures, whlch are given as a non-restrlctive 17 example, show two variants of the invention as follows:-18 Figs . la~ lb and lc show a cycle of making a bend in the 19 trailing end according to a first formulation of thiS invention;
21 Figs.2a, 2b, 2c, 2d, 2e and 2f show a cycle of making a bend 22 in the trailing end according to a second 23 formulation of this invention.
24 Figs.1 show a cycle of making a bend in the trailing end of a bar according to a first formulation of the method of 26 this invention.
27 Fig.la shows a bar 10 coming in this example from a wound28 roll, the bar 10 having undergone all the bending operations 29 except that of its trailing end; for the sake of simplicity the bends made consist here of one single bend 23, which in 31 this case is a hook in the leading end of the bar 10.
32 The displacements of the bar 10 along the working plane 33 are brought about by a drawing assembly 11 located upstream ~Q80~
1 of a bending assembly 12.
2 The drawing assembly 11 may comprise also a straightening 3 assembly or may consist of a straightening assembly alone.
4 The drawing assembly 11 and bending assembly 12 form part 5 of the state of the art and are therefore unimportant for 6 the purposes of the invention.
7 In this example the bending assembly 12 comprises a 8 bending disk 13, a bending pln 14 and an abutment roll 15.
9 The rod 10 is sheared to the desired length by a shearing assembly 16 and thus is separated from a feeding section 22.
11 When all the bends 23 have been made except the bend in 12 the trailing end, the sheared bar 10 is thrust downstream by 13 the feeding section 22, which is drawn forwards by the 14 desired length and cooperates by butting against the bar 10 (Fig.lb).
16 Next, the feeding section 22 is moved backwards and the 17 bending assembly 12 makes the bend in the trailing end 24,in 18 this case a lefthand bend (Fig.lc); this bend 24 in the 19 trailing end can be of any type.
So as to keep the bar 10 rigidly in position during the 21 step of bending the trailing end, clamping means 17 are 22 positioned downstream of the bending unit 12 and consist, in 23 this case, of two idler rolls 18 capable of a movement 29 orthogonal to the working plane in this example.
These clamping means 17 are retractable so as to enable 26 the preceding bends 23 to be made without the bar 10 coming 27 into contact with the clamping means 17.
28 The clamping means 17 may also consist of a vice or, where 29 they consist of rolls, may be capable also of rotary movement.
31 In Fig.la the clamping means 17 are located below the 32 working plane, whereas in Fig.lb the clamping means 17 33 position the bar 10 and let it slide, while in Fig.lc the 2~8~
1 clamping means 17 grip the bar 10 and keep it in position 2 during the performance of the bend 24 in the trailing endA
3 Figs.2 show a cycle of making a bend in the trailing end 4 according to the second formulation of the method of this invention.
6 Fig.2a shows a rod 10 coming, in this case, from a wound 7 roll of a feeding section 22 and having all the bends 23, 8 except bends 24 ln the trailing end, already made; these 9 bends 23 already made are summarized in this case with one single hook. With all these bends 23 made, the bar 10 is 11 sheared to the desired length by the shearing assembly 16 12 (Fig.2a).
13 So as to Carry out the method, the bending assembly 12 iS
14 positioned on a sultable slider 19 whlch can move on guides lS 21 parallel to the axis of feed of the bar 10.
16 After making the bends 23, but not bends in the trailing 17 end, and after the bar 10 has been sheared to the desired 18 length, the bending assembly 12 is rotated about its axis 19 until the bending pin 14 rests against the bar 10 and compels the bar 10 to rest against a clamping means 117, so 21 that the bar 10 is clamped between the bending pin 14 and 22 the abutment roll 15 (Fig.2b).
23 In this case the clamping means 117 are retractable and 24 consist of tw~ idler rolls 20 capable, in this example, of a movement orthogonal to the working plane.
26 When the bar 10 has been clamped between the bending pin 27 14 and abutment roll 15, the bending assembly 12 (Fig.2c) 28 is moved downstream by the desired distance and takes the 29 bar 10 with it.
When the bar 10 has reached the desired poSition and while 31 the clamping meanS 117 take action and clamp the bar 10, the 32 bending pin 14 rotates in the opposite direction and 33 releases the bar 10 from its grip (Fig.2d).
2 ~ 8 0 t3 ~ r~
1 Next, the bending assembly 12 retreats to its bending 2 position (Fig.2e), where it makes the bend 24 in the 3 trailing end with the desired bending angle (Fig.2f).
4 The bending assembly 12 may be of any type and may carry out any other known auxiliary movement.
11 When all the bends 23 have been made except the bend in 12 the trailing end, the sheared bar 10 is thrust downstream by 13 the feeding section 22, which is drawn forwards by the 14 desired length and cooperates by butting against the bar 10 (Fig.lb).
16 Next, the feeding section 22 is moved backwards and the 17 bending assembly 12 makes the bend in the trailing end 24,in 18 this case a lefthand bend (Fig.lc); this bend 24 in the 19 trailing end can be of any type.
So as to keep the bar 10 rigidly in position during the 21 step of bending the trailing end, clamping means 17 are 22 positioned downstream of the bending unit 12 and consist, in 23 this case, of two idler rolls 18 capable of a movement 29 orthogonal to the working plane in this example.
These clamping means 17 are retractable so as to enable 26 the preceding bends 23 to be made without the bar 10 coming 27 into contact with the clamping means 17.
28 The clamping means 17 may also consist of a vice or, where 29 they consist of rolls, may be capable also of rotary movement.
31 In Fig.la the clamping means 17 are located below the 32 working plane, whereas in Fig.lb the clamping means 17 33 position the bar 10 and let it slide, while in Fig.lc the 2~8~
1 clamping means 17 grip the bar 10 and keep it in position 2 during the performance of the bend 24 in the trailing endA
3 Figs.2 show a cycle of making a bend in the trailing end 4 according to the second formulation of the method of this invention.
6 Fig.2a shows a rod 10 coming, in this case, from a wound 7 roll of a feeding section 22 and having all the bends 23, 8 except bends 24 ln the trailing end, already made; these 9 bends 23 already made are summarized in this case with one single hook. With all these bends 23 made, the bar 10 is 11 sheared to the desired length by the shearing assembly 16 12 (Fig.2a).
13 So as to Carry out the method, the bending assembly 12 iS
14 positioned on a sultable slider 19 whlch can move on guides lS 21 parallel to the axis of feed of the bar 10.
16 After making the bends 23, but not bends in the trailing 17 end, and after the bar 10 has been sheared to the desired 18 length, the bending assembly 12 is rotated about its axis 19 until the bending pin 14 rests against the bar 10 and compels the bar 10 to rest against a clamping means 117, so 21 that the bar 10 is clamped between the bending pin 14 and 22 the abutment roll 15 (Fig.2b).
23 In this case the clamping means 117 are retractable and 24 consist of tw~ idler rolls 20 capable, in this example, of a movement orthogonal to the working plane.
26 When the bar 10 has been clamped between the bending pin 27 14 and abutment roll 15, the bending assembly 12 (Fig.2c) 28 is moved downstream by the desired distance and takes the 29 bar 10 with it.
When the bar 10 has reached the desired poSition and while 31 the clamping meanS 117 take action and clamp the bar 10, the 32 bending pin 14 rotates in the opposite direction and 33 releases the bar 10 from its grip (Fig.2d).
2 ~ 8 0 t3 ~ r~
1 Next, the bending assembly 12 retreats to its bending 2 position (Fig.2e), where it makes the bend 24 in the 3 trailing end with the desired bending angle (Fig.2f).
4 The bending assembly 12 may be of any type and may carry out any other known auxiliary movement.
Claims (6)
1 - Method to make bends in the trailing ends of bars for building work in bending-shaping machines which comprise in working sequence a drawing and/or straightening assembly (11), a shearing assembly (16), a bending assembly (12) and clamping means (17-117), which have a first retracted position under the working plane and a second working position, the bars for building work being obtained from a bar (10) coming from a feeding section (22) possibly wound in a roll, the method being characterized in that the bar (10) with all its bends already made except a bend (29) in its trailing end is separated from the feeding section (22) and is fed forwards downstream by a required length, the bend (24) in its trailing end being then carried out in cooperation with the clamping means (17-117).
2 - Method as claimed in Claim 1, whereby the downstream movement of the sheared bar (10) is achieved by means of a substantially axial thrust applied by the feeding section (22).
3 - Method as claimed in Claim 1, whereby the forward movement of the sheared bar (10) is carried out by the bending assembly (12) after the bar has been clamped by the bending assembly (12) by means of rotation of a bending pin (14).
4 - Bending-shaping machine for bars for building work, which comprises in working sequence a drawing and/or straightening assembly (11), a shearing assembly (16), a bending assembly (12) and clamping means (17-117), which have a first retracted position under the working plane and a second working position, the bars for building work being obtained from a bar (10) coming from a feeding section (22) possibly wound in a roll, the machine being characterized in that it comprises means for the controlled forward displacement (11-12) of the feeding section (22) partly pre-shaped and sheared to a required length.
5 - Means as in Claim 4, in which the means for the controlled forward displacement consist of the drawing assembly (11).
6 - Means as in Claim 9, in which the means for the controlled forward displacement consist of the bending assembly (12) able to move along the axis of the forward movement of the bar (10), the bending assembly (12) having a first position with the bar free, a second bending/shaping position and a third position of clamping the bar (10) for drawing the same.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITUD91A000169 | 1991-10-15 | ||
| ITUD910169A IT1252962B (en) | 1991-10-15 | 1991-10-15 | PROCEDURE FOR THE EXECUTION OF THE TAIL FOLDS IN THE IRONS FOR BUILDING IN BENDING / SHAPING MACHINES AND BENDING / SHAPING MACHINES FOR BUILDING IRONS FOR CONSTRUCTION ADOPTING THIS PROCEDURE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2080032A1 true CA2080032A1 (en) | 1993-04-16 |
Family
ID=11420927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002080032A Abandoned CA2080032A1 (en) | 1991-10-15 | 1992-10-07 | Method to make bends in the trailing ends of bars for building work in bending-shaping machines, and bending-shaping machines for bars for building work which employ such method |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0537496A1 (en) |
| KR (1) | KR930007531A (en) |
| CA (1) | CA2080032A1 (en) |
| IT (1) | IT1252962B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1295107B1 (en) * | 1997-04-29 | 1999-04-30 | Piegatrici Macch Elettr | BENDING SYSTEM PERFECTED FOR BENDING MACHINES |
| ITBO20010208A1 (en) * | 2001-04-06 | 2002-10-06 | Me Sa Di Terenzi Gianfranco | METHOD FOR BENDING METAL PROFILES IN BARS AND MACHINES TO IMPLEMENT THIS METHOD |
| ITBO20010209A1 (en) * | 2001-04-06 | 2002-10-06 | Me Sa Di Terenzi Gianfranco | METHOD FOR BENDING METAL PROFILES IN BARS AND MACHINE TO IMPLEMENT THIS METHOD |
| ATE359879T1 (en) * | 2001-09-14 | 2007-05-15 | Piegatrici Macch Elettr | BENDING DEVICE FOR PROFILES, AND ROUND REINFORCEMENT PARTS OR SIMILAR |
| ITUD20010197A1 (en) * | 2001-11-30 | 2003-05-30 | Piegatrici Macch Elettr | BENDING MACHINE FOR PROFILES, SUCH AS ROUND ARMOR OR SIMILAR |
| EP1396296B1 (en) * | 2002-09-04 | 2005-07-20 | Schnell S.p.A. | Method for cropping to size and optionally bending profiled elements with bending and shaping machines, particularly profiled elements supplied in bar form |
| GR1005272B (en) | 2005-11-15 | 2006-09-12 | Method and system for bending wires, concrete bars and materials of prismatic cross section | |
| CN105013986B (en) * | 2015-05-27 | 2017-10-13 | 德清铭泰户外用品有限公司 | A kind of steel wire bends cutting equipment automatically |
| CN105195651B (en) * | 2015-10-29 | 2017-08-08 | 安溪县大富山家庭农场 | The novel forming method of foundation bolt |
| CN105414400B (en) * | 2015-10-29 | 2017-11-24 | 南京新侨鑫环保科技有限公司 | A kind of foundation bolt production line |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1249057B (en) * | 1967-08-31 | Fa Paul Ferd Peddmghaus Gevelsberg (Westf) | Driver for fittings for reinforcing steel bending machines | |
| US3553990A (en) * | 1968-04-23 | 1971-01-12 | Pines Engineering Co Inc | Tube bender pressure die interference control |
| IT1024224B (en) * | 1974-11-15 | 1978-06-20 | Del Fabbro Remigio | MAOCHINA CONTINUOUS SUPPLY SUPPLY BRACKET WITH MATERIAL RECOVERY AND RELEVANT ME TODO OF OBERARE FOR THE QUSTRUTION OF THE SAID BRACKETS |
| EP0238026B1 (en) * | 1986-03-14 | 1991-06-26 | Ruhl, Heinz | Method of and device for bending bar-shaped materials |
| IT1235177B (en) * | 1989-01-18 | 1992-06-23 | Piegatrici Macch Elettr | DOWNSTREAM DRIVER GROUP FOLDER GROUP AND TAIL BENDING PROCEDURE. |
-
1991
- 1991-10-15 IT ITUD910169A patent/IT1252962B/en active IP Right Grant
-
1992
- 1992-09-18 EP EP92116005A patent/EP0537496A1/en not_active Withdrawn
- 1992-10-07 CA CA002080032A patent/CA2080032A1/en not_active Abandoned
- 1992-10-08 KR KR1019920018446A patent/KR930007531A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| IT1252962B (en) | 1995-07-07 |
| ITUD910169A0 (en) | 1991-10-15 |
| ITUD910169A1 (en) | 1993-04-15 |
| KR930007531A (en) | 1993-05-20 |
| EP0537496A1 (en) | 1993-04-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |