CN105170743A - Molding method of thin-wall spiral coil made of tantalum materials - Google Patents
Molding method of thin-wall spiral coil made of tantalum materials Download PDFInfo
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- CN105170743A CN105170743A CN201510603324.9A CN201510603324A CN105170743A CN 105170743 A CN105170743 A CN 105170743A CN 201510603324 A CN201510603324 A CN 201510603324A CN 105170743 A CN105170743 A CN 105170743A
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Abstract
The invention discloses a molding method of a thin-wall spiral coil made of tantalum materials. The molding method comprises the following steps that 1, one end of a thin-wall tantalum pipe is sealed, the thin-wall tantalum pipe is filled with fine sand grains, and the outer end of the thin-wall tantalum pipe is sealed after filling is finished; 2, a mold is manufactured; 3, the mold is fixed to a workbench of a positioner, one end of the thin-wall tantalum pipe is fixedly connected with the mold, the positioner is turned on to enable the workbench to rotate at a constant speed, and the thin-wall tantalum pipe is coiled around the mold for molding; and 4, the positioner is turned off after coiled molding is finished, the two ends of the thin-wall tantalum pipe are cut away, the thin-wall tantalum pipe is screwed out of the mold, the fine sand grains in the thin-wall tantalum pipe are removed, and therefore the thin-wall spiral coil made of the tantalum materials is obtained. The molding method is easy and convenient to operate, high in efficiency and low in cost. According to the coil molded through the molding method, the appearance quality is high, the surface is smooth, the outer side is prevented from being flattened when pressed, the inner side is prevented from being wrinkled when compressed, and the surface has no crack or scratch or pit or other defect.
Description
Technical field
The invention belongs to coil pipe field shaping technique, be specifically related to a kind of forming method of thin wall tantalum material matter spiral coil.
Background technology
Tantalum is that a kind of plasticity is better, have extremely strong acidproof, the refractory metal of the superior function such as alkali and liquid metal, in the resistless strong corrosive environment of other Rare Metals Materials, tantalum material can be competent at, its resistance to corrosion can match in excellence or beauty with glassy phase, due to the low content in this special nature of tantalum and the earth's crust, make it expensive, therefore tubing many employings light-wall pipe of tantalum material, the structure of light-wall pipe is again based on spiral coil, application scenario not only comprises hydrochloric acid, the strong corrosive environment such as red fuming nitric acid (RFNA) and " chloroazotic acid ", under given conditions, to aqueous slkali, chlorine, bromine water, dilute sulfuric acid and other many medicaments all do not corrode, application is unique and wide.
Tantalum material helix tube shaping is a technical bottleneck in industry all the time, although there is mechanism constantly to attempt, study for many years, but molding effect is always undesirable, its main cause is that tantalum thickness of pipe wall is little, deforms in process at coil pipe, a circumferential tension is produced outside coil pipe, inner side produces a compression, and tension forces light-wall pipe to produce extruding to center position, and pipe inside does not support, be easy to be crushed, cross section presents ellipse.Compression makes to be squeezed inside light-wall pipe, and same because of the not support of pipe inside, inner side deforms, and produces fold, and flattening and fold cause the shaping failure of coil pipe.
In addition, the tubing of longer dimension is needed when making coil pipe, a standard pipe length does not far reach, many are needed to splice boxing, this just certainly will form splicing welding joint on tubing, in coil pipe process, tubing becomes spirality from straight tube generation plastic deformation, and weld seam is likely damaged and reduces lumber recovery.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, provides a kind of forming method of thin wall tantalum material matter spiral coil.The method adopts light-wall pipe inside to fill the method for fine sand grain, successfully solves the technical barrier of the pipe distortion that pressurized causes inside the tension of outside in light-wall pipe coil pipe deformation process, make shaping after thin-walled tantalum tube section keep circular; According to wanted shaping coil arrangement and size mfg. moulding die, utilize the rotation of positioner to realize the coiling of coil pipe shaping, shaping coil size is accurate, and error is little.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of forming method of thin wall tantalum material matter spiral coil, is characterized in that, comprise the following steps:
Step one, wall thickness is not more than thin-walled tantalum pipe one end sealing of 1mm, then adopts fine sand grain filling thin-walled tantalum pipe, after filling, the other end of thin-walled tantalum pipe is sealed; The average grain diameter of described fine sand grain is 0.25mm ~ 0.35mm, and modulus of fineness is 1.6 ~ 2.2;
Step 2, make mould according to the shape and size of wanted shaping thin wall tantalum material matter spiral coil;
Step 3, mould described in step 2 is fixed on the workbench of positioner, then fine sand grain will be filled with in step one and one end of thin-walled tantalum pipe that two ends all seal is fixedly connected with mould, opening positioner makes workbench at the uniform velocity rotate, and thin-walled tantalum pipe is shaping along mould coiling;
Step 4, until coiling described in step 3 is shaping complete after close positioner, the two ends of thin-walled tantalum pipe after excision coiling is shaping, then screw out thin-walled tantalum pipe from mould, remove the fine sand grain in thin-walled tantalum pipe, obtain thin wall tantalum material matter spiral coil.
The forming method of above-mentioned a kind of thin wall tantalum material matter spiral coil, it is characterized in that, mould described in step 2 comprises columned die ontology, the circumferencial direction car of described die ontology has the helical groove matched with wanted shaping thin wall tantalum material matter spiral coil, and the surface roughness Ra of described helical groove is not more than 3.2 μm.
The forming method of above-mentioned a kind of thin wall tantalum material matter spiral coil, is characterized in that, the distance L1 between the axis of adjacent two pipes of described thin wall tantalum material matter spiral coil is equal with the distance L2 between the axis of adjacent two helical grooves of mould.
The forming method of above-mentioned a kind of thin wall tantalum material matter spiral coil, it is characterized in that, the longitudinal section of described helical groove comprises symmetrically arranged two chamfering sections and the arc section between two chamfering sections, and for connecting the straightway of chamfering section and arc section, the radius R of described arc section is equal with the radius of thin-walled tantalum pipe.
The forming method of above-mentioned a kind of thin wall tantalum material matter spiral coil, it is characterized in that, described arc section is semi arch.
The forming method of above-mentioned a kind of thin wall tantalum material matter spiral coil, is characterized in that, the chamfer radius r of described chamfering section is 0.1 ~ 0.16 times of the radius R of arc section.
The forming method of above-mentioned a kind of thin wall tantalum material matter spiral coil, is characterized in that, the depth H 8mm ~ 10mm larger than the radius R of arc section of described helical groove.
The forming method of above-mentioned a kind of thin wall tantalum material matter spiral coil, is characterized in that, the shaping speed of coiling described in step 3 is not more than 5mm/s.
The present invention compared with prior art has the following advantages:
1, the present invention adopts light-wall pipe inside to fill the method for fine sand grain, successfully solves the technical barrier of the pipe distortion that pressurized causes inside the tension of outside in light-wall pipe coil pipe deformation process, make shaping after thin-walled tantalum tube section keep circular.
2, the present invention is according to wanted shaping coil arrangement and size mfg. moulding die, utilizes the rotation of positioner to realize the coiling of coil pipe shaping, and shaping coil size is accurate, and error is little.
3, method of the present invention is easy and simple to handle, and efficiency is high, with low cost.The coil pipe presentation quality adopting method of the present invention shaping is high, smooth surface, and outside does not produce flattening, and inner side does not produce fold because of compression, the defects such as surperficial flawless, scuffing, pit.
The splicing welding joint of the thin wall tantalum material matter spiral coil after 4, shaping to the present invention carries out 100%RT detection, meets JB/T4730.2-2005 II grade regulation; 100%PT detection is carried out on butt welded seam surface, meets JB/T4730.5-2005 I grade regulation.
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the assembling schematic diagram of mould of the present invention and positioner.
Fig. 2 is the structural representation of mould of the present invention.
Fig. 3 is the structural representation of the shaping thin wall tantalum material matter spiral coil of the present invention.
Fig. 4 is the Longitudinal cross section schematic of helical groove of the present invention.
Description of reference numerals:
1-workbench; 2-mould; 2-1-die ontology;
2-2-helical groove; 2-21-chamfering section; 2-22-arc section;
2-23-straightway; 3-thin-walled tantalum pipe.
Detailed description of the invention
Embodiment 1
The present embodiment adopts specification to be the thin-walled tantalum pipe forming thin-walled tantalum material spiral coil of Φ 38mm × 0.8mm, want adjacent two pipes of shaping thin wall tantalum material matter spiral coil axis between distance L1 be 80mm, shaping concrete grammar comprises the following steps:
Step one, thin-walled tantalum pipe one end to be sealed, then the filling thin-walled tantalum pipe of fine sand grain is adopted, continue in filling process to beat or vibrate thin-walled tantalum pipe, ensure the substantial densification that fine sand grain is filled, by the other end of thin-walled tantalum pipe sealing (preventing fine sand grain from leaking) after filling; The average grain diameter of described fine sand grain is 0.25mm ~ 0.35mm, and modulus of fineness is 1.6 ~ 2.2;
Step 2, make mould 2 according to the shape and size of wanted shaping thin wall tantalum material matter spiral coil, as shown in Figures 2 and 3, described mould comprises columned die ontology 2-1, the circumferencial direction car of described die ontology 2-1 has the helical groove 2-2 matched with wanted shaping thin wall tantalum material matter spiral coil, and the surface roughness Ra of described helical groove 2-2 is not more than 3.2 μm; Distance L2 between the axis of adjacent two helical groove 2-2 of described mould 2 is 80mm; As shown in Figure 4, the longitudinal section of described helical groove 2-2 comprises symmetrically arranged two chamfering section 2-21 and the arc section 2-22 between two chamfering section 2-21, and for connecting the straightway 2-23 of chamfering section 2-21 and arc section 2-22, the radius R of described arc section 2-22 is 19mm; Described arc section 2-22 is semi arch; The chamfer radius r of described chamfering section 2-21 is 1.9mm; The depth H of described helical groove 2-2 is 28mm;
Step 3, as shown in Figure 1, mould 2 described in step 2 is fixed on the workbench 1 of positioner, then fine sand grain will be filled with in step one and one end of thin-walled tantalum pipe 3 that two ends all seal is connected with mould 2 end winding support, opening positioner makes workbench at the uniform velocity rotate; thin-walled tantalum pipe 3 is shaping along mould coiling, and the shaping speed of described coiling is 5mm/s (length of shaping thin-walled tantalum pipe per second is 5mm);
Step 4, until coiling described in step 3 is shaping complete after close positioner, the two ends of thin-walled tantalum pipe 3 after excision coiling is shaping, then screw out thin-walled tantalum pipe 3 from mould 2, remove the fine sand grain of thin-walled tantalum pipe 3 li, obtain thin wall tantalum material matter spiral coil.
The size of the thin wall tantalum material matter spiral coil that the present embodiment is shaping is accurate, coil surface flat smooth, the defects such as corrugationless, flattening, crackle, scuffing, after testing, on the same section of shaping coil pipe, the difference of maximum inner diameter and minimum diameter is not more than 5% of shaping front pipe internal diameter, higher than the requirement of national standard 15%.100%RT is carried out to the splicing welding joint of the thin wall tantalum material matter spiral coil after shaping, meets JB/T4730.2-2005 II grade regulation; 100%PT detection is carried out on butt welded seam surface, meets JB/T4730.5-2005 I grade regulation.
Embodiment 2
The present embodiment adopts specification to be the thin-walled tantalum pipe forming thin-walled tantalum material spiral coil of Φ 45mm × 1mm, want adjacent two pipes of shaping thin wall tantalum material matter spiral coil axis between distance L1 be 100mm, shaping concrete grammar comprises the following steps:
Step one, thin-walled tantalum pipe one end to be sealed, then the filling thin-walled tantalum pipe of fine sand grain is adopted, continue in filling process to beat or vibrate thin-walled tantalum pipe, ensure the substantial densification that fine sand grain is filled, by the other end of thin-walled tantalum pipe sealing (preventing fine sand grain from leaking) after filling; The average grain diameter of described fine sand grain is 0.25mm ~ 0.35mm, and modulus of fineness is 1.6 ~ 2.2;
Step 2, make mould 2 according to the shape and size of wanted shaping thin wall tantalum material matter spiral coil, as shown in Figures 2 and 3, described mould comprises columned die ontology 2-1, the circumferencial direction car of described die ontology 2-1 has the helical groove 2-2 matched with wanted shaping thin wall tantalum material matter spiral coil, and the surface roughness Ra of described helical groove 2-2 is not more than 3.2 μm; Distance L2 between the axis of adjacent two helical groove 2-2 of described mould 2 is 100mm; As shown in Figure 4, the longitudinal section of described helical groove 2-2 comprises symmetrically arranged two chamfering section 2-21 and the arc section 2-22 between two chamfering section 2-21, and for connecting the straightway 2-23 of chamfering section 2-21 and arc section 2-22, the radius R of described arc section 2-22 is 22.5mm; Described arc section 2-22 is semi arch; The chamfer radius r of described chamfering section 2-21 is 3.6mm; The depth H of described helical groove 2-2 is 30.5mm;
Step 3, as shown in Figure 1, mould 2 described in step 2 is fixed on the workbench 1 of positioner, then fine sand grain will be filled with in step one and one end of thin-walled tantalum pipe 3 that two ends all seal is connected with mould 2 end winding support, opening positioner makes workbench at the uniform velocity rotate; thin-walled tantalum pipe 3 is shaping along mould coiling, and the shaping speed of described coiling is 4mm/s (length of shaping thin-walled tantalum pipe per second is 4mm);
Step 4, until coiling described in step 3 is shaping complete after close positioner, the two ends of thin-walled tantalum pipe 3 after excision coiling is shaping, then screw out thin-walled tantalum pipe 3 from mould 2, remove the fine sand grain of thin-walled tantalum pipe 3 li, obtain thin wall tantalum material matter spiral coil.
The size of the thin wall tantalum material matter spiral coil that the present embodiment is shaping is accurate; light-wall pipe surfacing is smooth; the defects such as corrugationless, flattening, crackle, scuffing; after testing; on the same section of shaping coil pipe, the difference of maximum inner diameter and minimum diameter is not more than 5% of shaping front pipe internal diameter, higher than the requirement of national standard 15%.100%RT is carried out to the splicing welding joint of the thin wall tantalum material matter spiral coil after shaping, meets JB/T4730.2-2005 II grade regulation; 100%PT detection is carried out on butt welded seam surface, meets JB/T4730.5-2005 I grade regulation.
Embodiment 3
The present embodiment adopts specification to be the thin-walled tantalum pipe forming thin-walled tantalum material spiral coil of Φ 57mm × 1mm, want adjacent two pipes of shaping thin wall tantalum material matter spiral coil axis between distance L1 be 150mm, shaping concrete grammar comprises the following steps:
Step one, thin-walled tantalum pipe one end to be sealed, then the filling thin-walled tantalum pipe of fine sand grain is adopted, continue in filling process to beat or vibrate thin-walled tantalum pipe, ensure the substantial densification that fine sand grain is filled, by the other end of thin-walled tantalum pipe sealing (preventing fine sand grain from leaking) after filling; The average grain diameter of described fine sand grain is 0.25mm ~ 0.35mm, and modulus of fineness is 1.6 ~ 2.2;
Step 2, make mould 2 according to the shape and size of wanted shaping thin wall tantalum material matter spiral coil, as shown in Figures 2 and 3, described mould comprises columned die ontology 2-1, the circumferencial direction car of described die ontology 2-1 has the helical groove 2-2 matched with wanted shaping thin wall tantalum material matter spiral coil, and the surface roughness Ra of described helical groove 2-2 is not more than 3.2 μm; Distance L2 between the axis of adjacent two helical groove 2-2 of described mould 2 is 150mm; As shown in Figure 4, the longitudinal section of described helical groove 2-2 comprises symmetrically arranged two chamfering section 2-21 and the arc section 2-22 between two chamfering section 2-21, and for connecting the straightway 2-23 of chamfering section 2-21 and arc section 2-22, the radius of described arc section 2-22 is 28.5mm; Described arc section 2-22 is semi arch; The chamfer radius r of described chamfering section 2-21 is 3.7mm; The depth H of described helical groove 2-2 is 38.5mm;
Step 3, as shown in Figure 1, mould 2 described in step 2 is fixed on the workbench 1 of positioner, then fine sand grain will be filled with in step one and one end of thin-walled tantalum pipe 3 that two ends all seal is connected with mould 2 end winding support, opening positioner makes workbench at the uniform velocity rotate; thin-walled tantalum pipe 3 is shaping along mould coiling, and the shaping speed of described coiling is 3mm/s (length of shaping thin-walled tantalum pipe per second is 3mm);
Step 4, until coiling described in step 3 is shaping complete after close positioner, the two ends of thin-walled tantalum pipe 3 after excision coiling is shaping, then screw out thin-walled tantalum pipe 3 from mould 2, remove the fine sand grain of thin-walled tantalum pipe 3 li, obtain thin wall tantalum material matter spiral coil.
The size of the thin wall tantalum material matter spiral coil that the present embodiment is shaping is accurate; light-wall pipe surfacing is smooth; the defects such as corrugationless, flattening, crackle, scuffing; after testing; on the same section of shaping coil pipe, the difference of maximum inner diameter and minimum diameter is not more than 5% of shaping front pipe internal diameter, higher than the requirement of national standard 15%.100%RT is carried out to the splicing welding joint of the thin wall tantalum material matter spiral coil after shaping, meets JB/T4730.2-2005 II grade regulation; 100%PT detection is carried out on butt welded seam surface, meets JB/T4730.5-2005 I grade regulation.
The above; it is only preferred embodiment of the present invention; not any restriction is done to the present invention, every above embodiment is done according to invention technical spirit any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.
Claims (8)
1. a forming method for thin wall tantalum material matter spiral coil, is characterized in that, comprises the following steps:
Step one, wall thickness is not more than thin-walled tantalum pipe one end sealing of 1mm, then adopts fine sand grain filling thin-walled tantalum pipe, after filling, the other end of thin-walled tantalum pipe is sealed; The average grain diameter of described fine sand grain is 0.25mm ~ 0.35mm, and modulus of fineness is 1.6 ~ 2.2;
Step 2, make mould (2) according to the shape and size of wanted shaping thin wall tantalum material matter spiral coil;
Step 3, mould described in step 2 (2) is fixed on the workbench (1) of positioner, then fine sand grain will be filled with in step one and one end of thin-walled tantalum pipe (3) that two ends all seal is fixedly connected with mould (2), opening positioner makes workbench at the uniform velocity rotate, and thin-walled tantalum pipe is shaping along mould coiling;
Step 4, until coiling described in step 3 is shaping complete after close positioner, the two ends of the thin-walled tantalum pipe (3) after excision coiling is shaping, then thin-walled tantalum pipe (3) is screwed out from mould (2), remove the fine sand grain that thin-walled tantalum pipe (3) is inner, obtain thin wall tantalum material matter spiral coil.
2. the forming method of a kind of thin wall tantalum material matter spiral coil according to claim 1, it is characterized in that, mould described in step 2 comprises columned die ontology (2-1), the circumferencial direction car of described die ontology (2-1) has the helical groove (2-2) matched with wanted shaping thin wall tantalum material matter spiral coil, and the surface roughness Ra of described helical groove (2-2) is not more than 3.2 μm.
3. the forming method of a kind of thin wall tantalum material matter spiral coil according to claim 2, it is characterized in that, the distance L1 between the axis of adjacent two pipes of described thin wall tantalum material matter spiral coil is equal with the distance L2 between the axis of adjacent two helical grooves (2-2) of mould (2).
4. the forming method of a kind of thin wall tantalum material matter spiral coil according to claim 2, it is characterized in that, the arc section (2-22) that the longitudinal section of described helical groove (2-2) comprises symmetrically arranged two chamfering sections (2-21) and is positioned between two chamfering sections (2-21), and for connecting the straightway (2-23) of chamfering section (2-21) and arc section (2-22), the radius R of described arc section (2-22) is equal with the radius of thin-walled tantalum pipe (3).
5. the forming method of a kind of thin wall tantalum material matter spiral coil according to claim 4, it is characterized in that, described arc section (2-22) is semi arch.
6. the forming method of a kind of thin wall tantalum material matter spiral coil according to claim 4, is characterized in that, the chamfer radius r of described chamfering section (2-21) is 0.1 ~ 0.16 times of the radius R of arc section (2-22).
7. the forming method of a kind of thin wall tantalum material matter spiral coil according to claim 1, is characterized in that, the depth H 8mm ~ 10mm larger than the radius R of arc section (2-22) of described helical groove (2-2).
8. the forming method of a kind of thin wall tantalum material matter spiral coil according to claim 1, is characterized in that, the shaping speed of coiling described in step 3 is not more than 5mm/s.
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| CN201510603324.9A CN105170743B (en) | 2015-09-21 | 2015-09-21 | A kind of forming method of thin wall tantalum material matter spiral coil |
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| CN201510603324.9A CN105170743B (en) | 2015-09-21 | 2015-09-21 | A kind of forming method of thin wall tantalum material matter spiral coil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108906940A (en) * | 2018-06-28 | 2018-11-30 | 湖州织里宝丰铝业有限公司 | Aluminium alloy ring pipe finishing circular arc molding device |
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| CN105170743B (en) | 2017-09-12 |
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