CN203830486U - Bending device for thin-walled pipe - Google Patents
Bending device for thin-walled pipe Download PDFInfo
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- CN203830486U CN203830486U CN201420254483.3U CN201420254483U CN203830486U CN 203830486 U CN203830486 U CN 203830486U CN 201420254483 U CN201420254483 U CN 201420254483U CN 203830486 U CN203830486 U CN 203830486U
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- walled tube
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- 238000005452 bending Methods 0.000 title claims abstract description 173
- 239000004698 Polyethylene Substances 0.000 claims description 54
- -1 polyethylene Polymers 0.000 claims description 54
- 229920000573 polyethylene Polymers 0.000 claims description 54
- 239000000463 material Substances 0.000 claims description 38
- 238000010030 laminating Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 24
- 238000003754 machining Methods 0.000 description 38
- 238000001035 drying Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 9
- 239000011796 hollow space material Substances 0.000 description 9
- 239000010687 lubricating oil Substances 0.000 description 9
- 238000003672 processing method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 229910001369 Brass Inorganic materials 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010951 brass Substances 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
Landscapes
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
A bending device for a thin-walled pipe comprises a guide mold and a push rod. The guide mold comprises a first guide mold body and a second guide mold body, the first guide mold body and the second guide mold body are attached and fixed to form a guide mold cavity, and the push rod is arranged inside the guide mold cavity. The thin-walled pipe can be well bent through the bending device. The bending pipe can prevent the thin-walled pipe from being torn in the bending process, wrinkling of the inner side of the thin-walled pipe and deformation of the cross section of the bending position can be effectively relieved when the thin-walled pipe is bent, and the phenomenon that the cross section at the bending position is flattened is prevented.
Description
Technical field
The utility model relates to a kind of Cold-forming process of metal, particularly the bending apparatus of thin-walled tube.
Background technology
The current common method to tube bending mainly contains: bending machine is crooked and scratch by hand curved.In the situation that producing in enormous quantities, the normal bending machine that adopts carries out bending; The in the situation that of small lot batch manufacture, scratching curved method carries out bending by hand in normal employing.Its principle is that pipe one end is fixed, and needs crooked inner side that one arc surface is set at pipe, pulls the other end of pipe, makes pipe paste arc surface and realizes crooked.
Be no matter to adopt above-mentioned bending machine crooked or scratches curvedly by hand, sweep material in the outer part makes tube wall tension-thining because of tension power effect meeting, and material in the inner part can make tube wall compress to thicken because of being squeezed; Under the effect of making a concerted effort in medial and lateral, also can make the cross section of tube bending position produce moderate finite deformation, especially when bending radius hour, there will be the pipe situation that material production is torn or material production is wrinkling or flatten in bending position cross section in the inner part in the outer part, cause completing bending machining.
When thin-walled tube is carried out to bending machining, processing technology is also comparatively complicated, and the spring of conventionally need jumping a queue in thin-walled tube inside maybe needs to fill with sand processing etc., the means such as also need if desired to adopt heat treatment or heat.If adopt the spring of jumping a queue in thin-walled tube inside, because spring supporting power is relatively concentrated, after bending, can form obvious local convex epirelief on the one hand, affect crudy; There will be on the other hand spring to take out difficult situation; If adopted, in thin-walled tube inside, fill with the method that sand is processed, thin-walled tube two ends need be sealed, complicated operation, and when bending radius hour, fill with the method that sand processes poor to the control effect of bending position cross-sectional deformability.
Utility model content
For above problem, the utility model provides a kind of device that can better realize thin-walled tube bending.When the utility model can avoid thin-walled tube crooked, produce and tear, can effectively reduce the distortion in thin-walled tube wrinkling and bending position cross section inside when crooked, prevent that bending position cross section from flattening the generation of phenomenon.
In order to realize the purpose of this utility model, the utility model provides a kind of bending apparatus of thin-walled tube.
A bending apparatus for thin-walled tube, comprises guide die, push rod;
Described guide die comprises the first guide die and the second guide die, the first described guide die and the second guide die laminating and fixing; The hollow space forming is guiding die cavity; Described push rod is placed in guiding die cavity.
Further technical scheme is, guiding die cavity is comprised of one section of straight shape directed cavity section and one section of arcuate guide chamber section, between the two for seamlessly transitting.
Further technical scheme is, the first guide die and the second guide die are symmetrical about binding face.
Further technical scheme is, push rod is placed in the entrance point of the straight shape directed cavity section in guiding die cavity.
Further technical scheme is, also comprises liner support stick.
Further technical scheme is, the material of described liner support stick is polyethylene.
Guiding die cavity is according to the shape needs after thin-walled tube bending, on the first guide die and the second guide die, processes respectively needed cavity, when the first guide die is relative with the second guide die while fitting, obtains needed guiding die cavity.
beneficial effect
Adopt utility model and using method, simple to operate, successful, especially in bending radius hour, in the time of can avoiding thin-walled tube crooked completely, crooked position material outside is torn the generation of phenomenon, effectively reduce the distortion that inside material produces wrinkling and bending position cross section, prevent the generation of bending position cross section flattening phenomenon, the smooth enforcement that not only can guarantee thin-walled tube bending machining also can guarantee the quality of thin-walled tube bending machining, and widened the range of work of thin-walled tube bending, " tube bending least radius " value of appointment in < < English KeYu mechanical engineer electronic documentation > > has been dwindled to 50% left and right.
1, guide die is arranged to two the first guide dies that separate and the second guide die, is in order to guarantee after thin-walled tube brake forming, conveniently thin-walled tube is taken out.The first guide die and the second guide die are symmetrical about binding face, processing that on the one hand can more convenient mould, also can guarantee on the other hand to form desired guiding die cavity after the first guide die and the second guide die are fitted, more on the one hand can be so that separately rear convenient thin-walled tube is taken out of the first guide die and the second guide die.
2, liner support stick material selection polyethylene, when using bending apparatus to carry out bending to thin-walled tube, liner support stick can play good supporting role, make support force more even, can effectively reduce the distortion in the wrinkling and cross section of thin-walled tube bending position inside material, avoid flattening the generation of phenomenon, guarantee the bending quality of thin-walled tube, reach smooth surface (smooth), full, the effect that curved surface is smooth, attractive in appearance; After thin-walled tube bending completes, only need to the crooked position of thin-walled tube, suitably heat with drying rifle; after the polyethylene rod of thin-walled tube inside is heated, can exit gradually to unbent one end; be more easily removed, and can not have any impact to the mechanical property of thin-walled tube by the temperature that baking rifle is heated to thin-walled tube.
Accompanying drawing explanation
Fig. 1 is the sectional structure chart on binding face before thin-walled tube bending in a kind of bending apparatus of thin-walled tube.
Fig. 2 is the top view before thin-walled tube bending in a kind of bending apparatus of thin-walled tube.
Fig. 3 is the sectional structure chart on binding face after thin-walled tube bending in a kind of bending apparatus of thin-walled tube.
Fig. 4 is the top view after thin-walled tube bending in a kind of bending apparatus of thin-walled tube.
1-guide die; 1-1-the first guide die; 1-2-the second guide die; 2-push rod; 3-thin-walled tube; 4-liner support stick; 5-guiding die cavity.
The specific embodiment
Below in conjunction with Figure of description, the utility model will be further described.
Embodiment 1
As shown in Figures 1 to 4
The external diameter 50mm of thin-walled tube 3, wall thickness 2mm, material is rustproof aluminum alloy, requiring the bending radius value of the thin-walled tube 3 after processing is R50mm.
A bending apparatus for thin-walled tube, comprises guide die 1, push rod 2;
Described guide die 1 comprises the first guide die 1-1 and the second guide die 1-2, and the first described guide die 1-1 and the second guide die 1-2 are symmetrical and fixing about binding face, and merging the hollow space forming is guiding die cavity 5;
Described guiding die cavity 5 is comprised of one section of straight shape directed cavity section and one section of arcuate guide chamber section, between the two for seamlessly transitting.
Described push rod 2 is placed in the entrance point of the straight shape directed cavity section in guiding die cavity 5.
Thin-walled tube bending method, comprises following steps:
The first step: one end of thin-walled tube 3 and polyethylene rod 4 is all processed into inclined-plane, lubricating oil is all coated in interior outside in thin-walled tube 3, polyethylene rod 4 is placed in thin-walled tube 3, keep bevel direction consistent, (during according to the external diameter of the internal diameter processing polyethylene rod 4 of thin-walled tube 3, polyethylene rod 4 being filled in to clearance control after thin-walled tube 3 in 0.1mm left and right);
Second step: the formed thin-walled tube 3 of the first step is placed in guiding die cavity 5, and the long part of the beveled end that makes thin-walled tube 3 is placed in the larger side of arcuate guide chamber section circular arc (during according to the footpath, chamber of the external diameter processing guide die 1 of thin-walled tube 3, thin-walled tube 3 being filled in to clearance control after guiding die cavity 5 in 0.15mm left and right) of guiding die cavity 5;
The 3rd step: the straight shape directed cavity section entrance point at guiding die cavity 5 packs push rod 2 into, thin-walled tube 3 and polyethylene rod 4 is together pushed to the arcuate guide chamber section of guiding die cavity 5;
The 4th step: after thin-walled tube 3 bendings complete, the first guide die 1-1 and the second guide die 1-2 are separated, take out thin-walled tube 3;
The 5th step: with drying rifle, the crooked position of thin-walled tube 3 is heated, take out the polyethylene rod 4 in thin-walled tube 3.
Use the utility model, realized the innovation to thin-walled tube bend processing method, the in the situation that of the supplementary means such as need not add heat treatment or heat, not only guaranteed thin-walled tube bending machining quality (be after thin-walled tube bending material outside without tearing phenomenon, inside material does not produce wrinkling, the distortion in bending position cross section is little, carry out repeatedly bending machining phenomenon all does not occur to flatten), and widened the scope of thin-walled tube bending machining, " tube bending least radius " value providing in < < English KeYu mechanical engineer electronic documentation > > has been dwindled to 50%, in handbook, to caliber, be that 50mm wall thickness is that the minimum bending radius value that the aluminum pipe of 2mm provides while carrying out bending machining is R100mm, adopt the utility model bending radius can be contracted to R50mm.
Embodiment 2
As shown in Figures 1 to 4
The external diameter 12mm of thin-walled tube 3, wall thickness 1mm, material is rustproof aluminum alloy, requiring the bending radius value of the thin-walled tube 3 after processing is R10mm.
A bending apparatus for thin-walled tube, comprises guide die 1, push rod 2;
Described guide die 1 comprises the first guide die 1-1 and the second guide die 1-2, and the first described guide die 1-1 and the second guide die 1-2 are symmetrical and fixing about binding face, and merging the hollow space forming is guiding die cavity 5;
Described guiding die cavity 5 is comprised of one section of straight shape directed cavity section and one section of arcuate guide chamber section, between the two for seamlessly transitting.
Described push rod 2 is placed in the entrance point of the straight shape directed cavity section in guiding die cavity 5.
Thin-walled tube bending method, comprises following steps:
The first step: one end of thin-walled tube 3 and polyethylene rod 4 is all processed into inclined-plane, lubricating oil is all coated in interior outside in thin-walled tube 3, polyethylene rod 4 is placed in thin-walled tube 3, keep bevel direction consistent, (during according to the external diameter of the internal diameter processing polyethylene rod 4 of thin-walled tube 3, polyethylene rod 4 being filled in to clearance control after thin-walled tube 3 in 0.1mm left and right);
Second step: the formed thin-walled tube 3 of the first step is placed in guiding die cavity 5, and the long part of the beveled end that makes thin-walled tube 3 is placed in the larger side of arcuate guide chamber section circular arc (during according to the footpath, chamber of the external diameter processing guide die 1 of thin-walled tube 3, thin-walled tube 3 being filled in to clearance control after guiding die cavity 5 in 0.1mm left and right) of guiding die cavity 5;
The 3rd step: the straight shape directed cavity section entrance point at guiding die cavity 5 packs push rod 2 into, thin-walled tube 3 and polyethylene rod 4 is together pushed to the arcuate guide chamber section of guiding die cavity 5;
The 4th step: after thin-walled tube 3 bendings complete, the first guide die 1-1 and the second guide die 1-2 are separated, take out thin-walled tube 3;
The 5th step: with drying rifle, the crooked position of thin-walled tube 3 is heated, take out the polyethylene rod 4 in thin-walled tube 3.
Use the utility model, realized the innovation to thin-walled tube bend processing method, the in the situation that of the supplementary means such as need not add heat treatment or heat, not only guaranteed thin-walled tube bending machining quality (be after thin-walled tube bending material outside without tearing phenomenon, inside material does not produce wrinkling, the distortion in bending position cross section is little, carry out repeatedly bending machining phenomenon all does not occur to flatten), and widened the scope of thin-walled tube bending machining, " tube bending least radius " value providing in < < English KeYu mechanical engineer electronic documentation > > has been dwindled to 50%, in handbook, to caliber, be that 12mm wall thickness is that the minimum bending radius value that the aluminum pipe of 1mm provides while carrying out bending machining is R20mm, adopt the utility model bending radius can be contracted to R10mm.
Embodiment 3
As shown in Figures 1 to 4
The external diameter 12mm of thin-walled tube 3, wall thickness 1mm, material is red copper, requiring the bending radius value of the thin-walled tube 3 after processing is R10mm.
A bending apparatus for thin-walled tube, comprises guide die 1, push rod 2;
Described guide die 1 comprises the first guide die 1-1 and the second guide die 1-2, and the first described guide die 1-1 and the second guide die 1-2 are symmetrical and fixing about binding face, and merging the hollow space forming is guiding die cavity 5;
Described guiding die cavity 5 is comprised of one section of straight shape directed cavity section and one section of arcuate guide chamber section, between the two for seamlessly transitting.
Described push rod 2 is placed in the entrance point of the straight shape directed cavity section in guiding die cavity 5.
Thin-walled tube bending method, comprises following steps:
The first step: one end of thin-walled tube 3 and polyethylene rod 4 is all processed into inclined-plane, lubricating oil is all coated in interior outside in thin-walled tube 3, polyethylene rod 4 is placed in thin-walled tube 3, keep bevel direction consistent, (during according to the external diameter of the internal diameter processing polyethylene rod 4 of thin-walled tube 3, polyethylene rod 4 being filled in to clearance control after thin-walled tube 3 in 0.05mm left and right);
Second step: the formed thin-walled tube 3 of the first step is placed in guiding die cavity 5, and the long part of the beveled end that makes thin-walled tube 3 is placed in the larger side of arcuate guide chamber section circular arc (during according to the footpath, chamber of the external diameter processing guide die 1 of thin-walled tube 3, thin-walled tube 3 being filled in to clearance control after guiding die cavity 5 in 0.05mm left and right) of guiding die cavity 5;
The 3rd step: the straight shape directed cavity section entrance point at guiding die cavity 5 packs push rod 2 into, thin-walled tube 3 and polyethylene rod 4 is together pushed to the arcuate guide chamber section of guiding die cavity 5;
The 4th step: after thin-walled tube 3 bendings complete, the first guide die 1-1 and the second guide die 1-2 are separated, take out thin-walled tube 3;
The 5th step: with drying rifle, the crooked position of thin-walled tube 3 is heated, take out the polyethylene rod 4 in thin-walled tube 3.
Use the utility model, realized the innovation to thin-walled tube bend processing method, the in the situation that of the supplementary means such as need not add heat treatment or heat, not only guaranteed thin-walled tube bending machining quality (be after thin-walled tube bending material outside without tearing phenomenon, inside material does not produce wrinkling, the distortion in bending position cross section is little, carry out repeatedly bending machining phenomenon all does not occur to flatten), and widened the scope of thin-walled tube bending machining, " tube bending least radius " value providing in < < English KeYu mechanical engineer electronic documentation > > has been dwindled to 50%, in handbook, to caliber, be that 12mm wall thickness is that the minimum bending radius value that the copper tube of 1mm provides while carrying out bending machining is R20mm, adopt the utility model bending radius can be contracted to R10mm.
Embodiment 4
As shown in Figures 1 to 4
The external diameter 16mm of thin-walled tube 3, wall thickness 1.5mm, material is red copper, requiring the bending radius value of the thin-walled tube 3 after processing is R15mm.
A bending apparatus for thin-walled tube, comprises guide die 1, push rod 2;
Described guide die 1 comprises the first guide die 1-1 and the second guide die 1-2, and the first described guide die 1-1 and the second guide die 1-2 are symmetrical and fixing about binding face, and merging the hollow space forming is guiding die cavity 5;
Described guiding die cavity 5 is comprised of one section of straight shape directed cavity section and one section of arcuate guide chamber section, between the two for seamlessly transitting.
Described push rod 2 is placed in the entrance point of the straight shape directed cavity section in guiding die cavity 5.
Thin-walled tube bending method, comprises following steps:
The first step: one end of thin-walled tube 3 and polyethylene rod 4 is all processed into inclined-plane, lubricating oil is all coated in interior outside in thin-walled tube 3, polyethylene rod 4 is placed in thin-walled tube 3, keep bevel direction consistent, (during according to the external diameter of the internal diameter processing polyethylene rod 4 of thin-walled tube 3, polyethylene rod 4 being filled in to clearance control after thin-walled tube 3 in 0.05mm left and right);
Second step: the formed thin-walled tube 3 of the first step is placed in guiding die cavity 5, and the long part of the beveled end that makes thin-walled tube 3 is placed in the larger side of arcuate guide chamber section circular arc (during according to the footpath, chamber of the external diameter processing guide die 1 of thin-walled tube 3, thin-walled tube 3 being filled in to clearance control after guiding die cavity 5 in 0.1mm left and right) of guiding die cavity 5;
The 3rd step: the straight shape directed cavity section entrance point at guiding die cavity 5 packs push rod 2 into, thin-walled tube 3 and polyethylene rod 4 is together pushed to the arcuate guide chamber section of guiding die cavity 5;
The 4th step: after thin-walled tube 3 bendings complete, the first guide die 1-1 and the second guide die 1-2 are separated, take out thin-walled tube 3;
The 5th step: with drying rifle, the crooked position of thin-walled tube 3 is heated, take out the polyethylene rod 4 in thin-walled tube 3.
Use the utility model, realized the innovation to thin-walled tube bend processing method, the in the situation that of the supplementary means such as need not add heat treatment or heat, not only guaranteed thin-walled tube bending machining quality (be after thin-walled tube bending material outside without tearing phenomenon, inside material does not produce wrinkling, the distortion in bending position cross section is little, carry out repeatedly bending machining phenomenon all does not occur to flatten), and widened the scope of thin-walled tube bending machining, " tube bending least radius " value providing in < < English KeYu mechanical engineer electronic documentation > > has been dwindled to 50%, in handbook, to caliber, be that 16mm wall thickness is that the minimum bending radius value that the copper tube of 1.5mm provides while carrying out bending machining is R30mm, adopt the utility model bending radius can be contracted to R15mm.
Embodiment 5
As shown in Figures 1 to 4
The external diameter 15mm of thin-walled tube 3, wall thickness 1mm, material is brass, requiring the bending radius value of the thin-walled tube 3 after processing is R15mm.
A bending apparatus for thin-walled tube, comprises guide die 1, push rod 2;
Described guide die 1 comprises the first guide die 1-1 and the second guide die 1-2, and the first described guide die 1-1 and the second guide die 1-2 are symmetrical and fixing about binding face, and merging the hollow space forming is guiding die cavity 5;
Described guiding die cavity 5 is comprised of one section of straight shape directed cavity section and one section of arcuate guide chamber section, between the two for seamlessly transitting.
Described push rod 2 is placed in the entrance point of the straight shape directed cavity section in guiding die cavity 5.
Thin-walled tube bending method, comprises following steps:
The first step: one end of thin-walled tube 3 and polyethylene rod 4 is all processed into inclined-plane, lubricating oil is all coated in interior outside in thin-walled tube 3, polyethylene rod 4 is placed in thin-walled tube 3, keep bevel direction consistent, (during according to the external diameter of the internal diameter processing polyethylene rod 4 of thin-walled tube 3, polyethylene rod 4 being filled in to clearance control after thin-walled tube 3 in 0.1mm left and right);
Second step: the formed thin-walled tube 3 of the first step is placed in guiding die cavity 5, and the long part of the beveled end that makes thin-walled tube 3 is placed in the larger side of arcuate guide chamber section circular arc (during according to the footpath, chamber of the external diameter processing guide die 1 of thin-walled tube 3, thin-walled tube 3 being filled in to clearance control after guiding die cavity 5 in 0.15mm left and right) of guiding die cavity 5;
The 3rd step: the straight shape directed cavity section entrance point at guiding die cavity 5 packs push rod 2 into, thin-walled tube 3 and polyethylene rod 4 is together pushed to the arcuate guide chamber section of guiding die cavity 5;
The 4th step: after thin-walled tube 3 bendings complete, the first guide die 1-1 and the second guide die 1-2 are separated, take out thin-walled tube 3;
The 5th step: with drying rifle, the crooked position of thin-walled tube 3 is heated, take out the polyethylene rod 4 in thin-walled tube 3.
Use the utility model, realized the innovation to thin-walled tube bend processing method, the in the situation that of the supplementary means such as need not add heat treatment or heat, not only guaranteed thin-walled tube bending machining quality (be after thin-walled tube bending material outside without tearing phenomenon, inside material does not produce wrinkling, the distortion in bending position cross section is little, carry out repeatedly bending machining phenomenon all does not occur to flatten), and widened the scope of thin-walled tube bending machining, " tube bending least radius " value providing in < < English KeYu mechanical engineer electronic documentation > > has been dwindled to 50%, in handbook, to caliber, be that 15mm wall thickness is that the minimum bending radius value that the brass tube of 1mm provides while carrying out bending machining is R30mm, adopt the utility model bending radius can be contracted to R15mm.
Embodiment 6
As shown in Figures 1 to 4
The external diameter 28mm of thin-walled tube 3, wall thickness 1.5mm, material is brass, requiring the bending radius value of the thin-walled tube 3 after processing is R25mm.
A bending apparatus for thin-walled tube, comprises guide die 1, push rod 2;
Described guide die 1 comprises the first guide die 1-1 and the second guide die 1-2, and the first described guide die 1-1 and the second guide die 1-2 are symmetrical and fixing about binding face, and merging the hollow space forming is guiding die cavity 5;
Described guiding die cavity 5 is comprised of one section of straight shape directed cavity section and one section of arcuate guide chamber section, between the two for seamlessly transitting.
Described push rod 2 is placed in the entrance point of the straight shape directed cavity section in guiding die cavity 5.
Thin-walled tube bending method, comprises following steps:
The first step: one end of thin-walled tube 3 and polyethylene rod 4 is all processed into inclined-plane, lubricating oil is all coated in interior outside in thin-walled tube 3, polyethylene rod 4 is placed in thin-walled tube 3, keep bevel direction consistent, (during according to the external diameter of the internal diameter processing polyethylene rod 4 of thin-walled tube 3, polyethylene rod 4 being filled in to clearance control after thin-walled tube 3 in 0.15mm left and right);
Second step: the formed thin-walled tube 3 of the first step is placed in guiding die cavity 5, and the long part of the beveled end that makes thin-walled tube 3 is placed in the larger side of arcuate guide chamber section circular arc (during according to the footpath, chamber of the external diameter processing guide die 1 of thin-walled tube 3, thin-walled tube 3 being filled in to clearance control after guiding die cavity 5 in 0.2mm left and right) of guiding die cavity 5;
The 3rd step: the straight shape directed cavity section entrance point at guiding die cavity 5 packs push rod 2 into, thin-walled tube 3 and polyethylene rod 4 is together pushed to the arcuate guide chamber section of guiding die cavity 5;
The 4th step: after thin-walled tube 3 bendings complete, the first guide die 1-1 and the second guide die 1-2 are separated, take out thin-walled tube 3;
The 5th step: with drying rifle, the crooked position of thin-walled tube 3 is heated, take out the polyethylene rod 4 in thin-walled tube 3.
Use the utility model, realized the innovation to thin-walled tube bend processing method, the in the situation that of the supplementary means such as need not add heat treatment or heat, not only guaranteed thin-walled tube bending machining quality (be after thin-walled tube bending material outside without tearing phenomenon, inside material does not produce wrinkling, the distortion in bending position cross section is little, carry out repeatedly bending machining phenomenon all does not occur to flatten), and widened the scope of thin-walled tube bending machining, " tube bending least radius " value providing in < < English KeYu mechanical engineer electronic documentation > > has been dwindled to 50%, in handbook, to caliber, be that 28mm wall thickness is that the minimum bending radius value that the brass tube of 1.5mm provides while carrying out bending machining is R50mm, adopt the utility model bending radius can be contracted to R25mm.
Embodiment 7
As shown in Figures 1 to 4
The external diameter 8mm of thin-walled tube 3, wall thickness 1mm, material is No. 20 steel, requiring the bending radius value of the thin-walled tube 3 after processing is R7.5mm.
A bending apparatus for thin-walled tube, comprises guide die 1, push rod 2;
Described guide die 1 comprises the first guide die 1-1 and the second guide die 1-2, and the first described guide die 1-1 and the second guide die 1-2 are symmetrical and fixing about binding face, and merging the hollow space forming is guiding die cavity 5;
Described guiding die cavity 5 is comprised of one section of straight shape directed cavity section and one section of arcuate guide chamber section, between the two for seamlessly transitting.
Described push rod 2 is placed in the entrance point of the straight shape directed cavity section in guiding die cavity 5.
Thin-walled tube bending method, comprises following steps:
The first step: one end of thin-walled tube 3 and polyethylene rod 4 is all processed into inclined-plane, lubricating oil is all coated in interior outside in thin-walled tube 3, polyethylene rod 4 is placed in thin-walled tube 3, keep bevel direction consistent, (during according to the external diameter of the internal diameter processing polyethylene rod 4 of thin-walled tube 3, polyethylene rod 4 being filled in to clearance control after thin-walled tube 3 in 0.1mm left and right);
Second step: the formed thin-walled tube 3 of the first step is placed in guiding die cavity 5, and the long part of the beveled end that makes thin-walled tube 3 is placed in the larger side of arcuate guide chamber section circular arc (during according to the footpath, chamber of the external diameter processing guide die 1 of thin-walled tube 3, thin-walled tube 3 being filled in to clearance control after guiding die cavity 5 in 0.15mm left and right) of guiding die cavity 5;
The 3rd step: the straight shape directed cavity section entrance point at guiding die cavity 5 packs push rod 2 into, thin-walled tube 3 and polyethylene rod 4 is together pushed to the arcuate guide chamber section of guiding die cavity 5;
The 4th step: after thin-walled tube 3 bendings complete, the first guide die 1-1 and the second guide die 1-2 are separated, take out thin-walled tube 3;
The 5th step: with drying rifle, the crooked position of thin-walled tube 3 is heated, take out the polyethylene rod 4 in thin-walled tube 3.
Use the utility model, realized the innovation to thin-walled tube bend processing method, the in the situation that of the supplementary means such as need not add heat treatment or heat, not only guaranteed thin-walled tube bending machining quality (be after thin-walled tube bending material outside without tearing phenomenon, inside material does not produce wrinkling, the distortion in bending position cross section is little, carry out repeatedly bending machining phenomenon all does not occur to flatten), and widened the scope of thin-walled tube bending machining, " tube bending least radius " value providing in < < English KeYu mechanical engineer electronic documentation > > has been dwindled to 50%, in handbook, to caliber, be that 8mm wall thickness is that the minimum bending radius value that the seamless steel pipe of 1mm provides while carrying out bending machining is R15mm, adopt the utility model bending radius can be contracted to R7.5mm.
Embodiment 8
As shown in Figures 1 to 4
The external diameter 18mm of thin-walled tube 3, wall thickness 1.5mm, material is No. 20 steel, requiring the bending radius value of the thin-walled tube 3 after processing is R20mm.
A bending apparatus for thin-walled tube, comprises guide die 1, push rod 2;
Described guide die 1 comprises the first guide die 1-1 and the second guide die 1-2, and the first described guide die 1-1 and the second guide die 1-2 are symmetrical and fixing about binding face, and merging the hollow space forming is guiding die cavity 5;
Described guiding die cavity 5 is comprised of one section of straight shape directed cavity section and one section of arcuate guide chamber section, between the two for seamlessly transitting.
Described push rod 2 is placed in the entrance point of the straight shape directed cavity section in guiding die cavity 5.
Thin-walled tube bending method, comprises following steps:
The first step: one end of thin-walled tube 3 and polyethylene rod 4 is all processed into inclined-plane, lubricating oil is all coated in interior outside in thin-walled tube 3, polyethylene rod 4 is placed in thin-walled tube 3, keep bevel direction consistent, (during according to the external diameter of the internal diameter processing polyethylene rod 4 of thin-walled tube 3, polyethylene rod 4 being filled in to clearance control after thin-walled tube 3 in 0.15mm left and right);
Second step: the formed thin-walled tube 3 of the first step is placed in guiding die cavity 5, and the long part of the beveled end that makes thin-walled tube 3 is placed in the larger side of arcuate guide chamber section circular arc (during according to the footpath, chamber of the external diameter processing guide die 1 of thin-walled tube 3, thin-walled tube 3 being filled in to clearance control after guiding die cavity 5 in 0.2mm left and right) of guiding die cavity 5;
The 3rd step: the straight shape directed cavity section entrance point at guiding die cavity 5 packs push rod 2 into, thin-walled tube 3 and polyethylene rod 4 is together pushed to the arcuate guide chamber section of guiding die cavity 5;
The 4th step: after thin-walled tube 3 bendings complete, the first guide die 1-1 and the second guide die 1-2 are separated, take out thin-walled tube 3;
The 5th step: with drying rifle, the crooked position of thin-walled tube 3 is heated, take out the polyethylene rod 4 in thin-walled tube 3.
Use the utility model, realized the innovation to thin-walled tube bend processing method, the in the situation that of the supplementary means such as need not add heat treatment or heat, not only guaranteed thin-walled tube bending machining quality (be after thin-walled tube bending material outside without tearing phenomenon, inside material does not produce wrinkling, the distortion in bending position cross section is little, carry out repeatedly bending machining phenomenon all does not occur to flatten), and widened the scope of thin-walled tube bending machining, " tube bending least radius " value providing in < < English KeYu mechanical engineer electronic documentation > > has been dwindled to 50%, in handbook, to caliber, be that 18mm wall thickness is that the minimum bending radius value that the seamless steel pipe of 1.5mm provides while carrying out bending machining is R40mm, adopt the utility model bending radius can be contracted to R20mm.
In above embodiment, adopt thin-walled tube bending method, by push rod applied thrust is realized to the bending machining to thin-walled tube, can effectively change the force-bearing situation of thin-walled tube in BENDING PROCESS, make the effect that is all squeezed of thin-walled tube sweep medial and lateral material, the generation that while effectively having avoided adopting common method crooked to thin-walled tube, the outside of thin-walled tube crooked position produces Splitting because of Tensile.
Inside thin-walled tube crooked position, required material is less than the required material in outside, therefore thin-walled tube one end is processed into inclined-plane, and the long part of thin-walled tube beveled end is positioned over to the larger side of arcuate guide chamber section circular arc of guiding die cavity, makes can allow thin-walled tube better crooked along the arcuate guide chamber of guiding die cavity in BENDING PROCESS.
Thin-walled tube surfaces externally and internally is all coated lubricating oil, can effectively reduce the resistance in BENDING PROCESS.
During due to thin-walled tube bending, be extrusion, so the wall thickness of thin-walled tube is thinner, resistance when crooked along guiding die cavity is also just less, and also just more easily realization is crooked.
In addition; in thin-walled tube bending method, should reduce the lead footpath, chamber of die cavity and the gap between the gap between thin-walled tube external diameter and polyethylene rod outside diameter and thin-walled tube internal diameter; above-mentioned two gap general controls are better when 0.05mm, can facilitate on the one hand polyethylene rod to fill in thin-walled tube as far as possible and facilitate thin-walled tube to be placed in guiding die cavity; The in the situation that of less in gap on the other hand, thin-walled tube forms material stacking without enough spaces in BENDING PROCESS, thereby reaches the effect of controlling wrinkling and bending position cross-sectional deformability, guarantees the quality of thin-walled tube bending machining.
Because the utility model need to be made corresponding bending apparatus for the thin-walled tube of different tube diameters and wall thickness, all embodiment in can not limit the utility model, therefore only by 8 embodiment, respectively employing aluminum pipe, copper tube, brass tube, steel pipe are illustrated, " the tube bending least radius " that evidence is compared in handbook had the progress breaking through, and the tube wall after bending is without tearing, without wrinkling, bending position distortion is little, and crudy is good, successful.
Claims (6)
1. a bending apparatus for thin-walled tube, is characterized in that, comprising: guide die (1), push rod (2); Described guide die (1) comprises the first guide die (1-1) and the second guide die (1-2), described the first guide die (1-1) and the second guide die (1-2) laminating and fixing, form guiding die cavity (5), described push rod (2) is placed in guiding die cavity (5).
2. the bending apparatus of a kind of thin-walled tube according to claim 1, is characterized in that, described guiding die cavity (5) is comprised of one section of straight shape directed cavity section and one section of arcuate guide chamber section.
3. the bending apparatus of a kind of thin-walled tube according to claim 1, is characterized in that, described the first guide die (1-1) and the second guide die (1-2) are symmetrical about binding face.
4. the bending apparatus of a kind of thin-walled tube according to claim 2, is characterized in that, described push rod (2) is placed in the entrance point of the straight shape directed cavity section in guiding die cavity (5).
5. the bending apparatus of a kind of thin-walled tube according to claim 1, is characterized in that, also comprises liner support stick (4).
6. the bending apparatus of a kind of thin-walled tube according to claim 5, is characterized in that, the material of described liner support stick (4) is polyethylene.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420254483.3U CN203830486U (en) | 2014-05-16 | 2014-05-16 | Bending device for thin-walled pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420254483.3U CN203830486U (en) | 2014-05-16 | 2014-05-16 | Bending device for thin-walled pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978078A (en) * | 2014-05-16 | 2014-08-13 | 张明光 | Bending device and bending method for thin-walled tube |
| CN105127259A (en) * | 2015-09-29 | 2015-12-09 | 西安优耐特容器制造有限公司 | Push-to-form method for thin-walled elbow |
| CN109807209A (en) * | 2017-11-21 | 2019-05-28 | 中国科学院金属研究所 | The bending apparatus and method of a kind of profile or tubing |
| CN113976696A (en) * | 2021-10-21 | 2022-01-28 | 保隆(安徽)汽车配件有限公司 | Pipe bending device |
-
2014
- 2014-05-16 CN CN201420254483.3U patent/CN203830486U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978078A (en) * | 2014-05-16 | 2014-08-13 | 张明光 | Bending device and bending method for thin-walled tube |
| CN105127259A (en) * | 2015-09-29 | 2015-12-09 | 西安优耐特容器制造有限公司 | Push-to-form method for thin-walled elbow |
| CN109807209A (en) * | 2017-11-21 | 2019-05-28 | 中国科学院金属研究所 | The bending apparatus and method of a kind of profile or tubing |
| CN113976696A (en) * | 2021-10-21 | 2022-01-28 | 保隆(安徽)汽车配件有限公司 | Pipe bending device |
| CN113976696B (en) * | 2021-10-21 | 2023-09-12 | 保隆(安徽)汽车配件有限公司 | Pipe bending device |
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