CN105562931A - Laser welding method for metal linings of spherical high-pressure gas cylinder walls - Google Patents
Laser welding method for metal linings of spherical high-pressure gas cylinder walls Download PDFInfo
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- CN105562931A CN105562931A CN201510996576.2A CN201510996576A CN105562931A CN 105562931 A CN105562931 A CN 105562931A CN 201510996576 A CN201510996576 A CN 201510996576A CN 105562931 A CN105562931 A CN 105562931A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/242—Fillet welding, i.e. involving a weld of substantially triangular cross section joining two parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/28—Seam welding of curved planar seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a laser welding method for metal linings of spherical high-pressure gas cylinder walls, and belongs to the technical field of metal material fusion welding. The laser welding method for the metal linings of the spherical high-pressure gas cylinder walls comprises the steps of arranging first bottom-locking steps at the joints between filler necks and lining bodies and arranging circular seam connection rings at the joints of the lining bodies, wherein filter screen assemblies comprise filter screens and filter screen reinforcing rings and the filter screen reinforcing rings are arranged on the two sides of the edges of the filter screens; welding the filler necks to inner holes of the lining bodies through the first bottom-locking steps; welding the filter screens into the lining bodies through the filter screen reinforcing rings; welding the lining bodies through the circular seam connection rings. According to the laser welding method for the metal linings of the spherical high-pressure gas cylinder walls, the welding size accuracy is guaranteed, and the welding quality is stable.
Description
Technical field
The present invention relates to metal material melting welding technology field, particularly a kind of spherical high-pressure gas cylinder wall metal inner lining method for laser welding.
Background technology
Filament-wound Machine metal lining composite material gas cylinder, can loss of weight 40% ~ 60% under identical pressure-bearing compared with simple metal gas cylinder, can overcome leakage hidden danger compared with non-metallic inner liner.Metal lining composite material gas cylinder is lightweight, pressure-bearing is high, heatproof is high, fatigue life is long, security is good, gradually pay close attention to by people, be expected to be widely used in fields such as aerospace, space flight, aviation, building and traffic.Usual composites gas cylinder adopts 3 ~ 4mm metal inner lining to manufacture, suitable thinning metal inner lining thickness can increase gas cylinder volume, reduces weight, improve gas cylinder specific strength, metal inner lining often adopts the material welding formings such as steel alloy, titanium alloy, aluminium alloy; thin-wall metal liner adopts conventional arc method to weld; distortion large-size precision not easily ensures, the many welding qualities of thin walled welds defect not easily ensure.
Summary of the invention
The invention provides a kind of spherical high-pressure gas cylinder wall metal inner lining method for laser welding, solving or partly solving thin-wall metal liner in prior art adopts conventional arc method to weld, distortion large-size precision not easily ensures, the technical problem that the many welding qualities of thin walled welds defect not easily ensure.
For solving the problems of the technologies described above, the invention provides a kind of method for laser welding of spherical high-pressure gas cylinder wall metal inner lining, described metal inner lining comprises two halves liner body, pressure inlet and net-filter assembly; Described pressure inlet and described liner body apposition position are provided with the first lock base frame rank, described two halves liner body apposition position is provided with circumferential weld T-Ring, described net-filter assembly comprises filter screen and filter screen reinforcing ring, described filter screen reinforcing ring is fixed on the inwall of described liner body, to wrap the edge established with described filter screen; Described method for laser welding comprises: the endoporus place described pressure inlet being welded on described liner body by described first lock base frame rank; Described filter screen is welded in described liner body by described filter screen reinforcing ring; By described circumferential weld T-Ring, described two halves liner body is welded.
Further, described first lock end step thicknesses is t/2, and width is 2t; The thickness of described circumferential weld T-Ring is 3/2t, and width is 10 ~ 15t; The thickness of described filter screen reinforcing ring is t, and width is 4 ~ 5t; T is the wall degree of liner body.
Further, assembling pressure inlet weld clip carrying out described pressure inlet and described liner body with weld; Described pressure inlet positions weldering, regulates laser weld rifle head to make rifle head guide ruddiness center to aim at pressure inlet girth joint center; Described pressure inlet carries out continuous welding and circumferential weld receives arc crater process.
Further, described pressure inlet is enclosed within described pressure inlet locating shaft, described pressure inlet bottom surface and described pressure inlet weld clip locating surface sturdy; Assemble described liner body, make the inner hole sleeve of described liner body at described pressure inlet flange cylindrical, and lock base frame rank with described first and described pressure inlet weld clip locating surface is sturdy; Described liner body cylindrical holds round and centering, and rotating cone axle travels forward, and fagging radially promotes by the conical surface, and described liner body holds round by fagging nose circle cambered surface, centering; Fixing described liner body, is enclosed within liner body cylindrical by pressure ring, make the bore circular arc face of described pressure ring and described liner body outer wall sturdy, pressure ring described in centering, fixes described pressure ring with screw rod.
Further, after circumferential weld overlap 5 ~ 10mm length of described pressure inlet, carry out that laser power is slow falls receipts arc, laser weld rifle head keeps former speed of welding to move on, laser power linearly decays to 0 by former bonding power, die-away time T=(2 ~ 3) W/V, wherein W is weld width, V is speed of welding, stop after bright dipping until laser, rifle head can stop motion.
Further, delineate described filter screen rigging position line in described liner inner body wall, described net-filter assembly is positioned over described liner body interior, and described net-filter assembly outer ledge is flushed with institute scribing line; Described filter screen is clipped in the middle by described Inner filter net reinforcing ring, firm welding; Angle welding tack welding is carried out in the described filter screen reinforcing ring position that to contact with liner body; Described filter screen reinforcing ring carries out sequential welding.
Further, described filter screen reinforcing ring outside diameter is greater than described liner body internal diameter.
Further; the described filter screen reinforcing ring position that contacts with described liner body is carried out angle welding tack welding and is comprised: described laser weld rifle head guides ruddiness center alignment angle Weld pipe mill deviation to be not more than 0.3mm; rifle head-clamp angle is 45 °; welding parameter: laser power 0.5-0.7kW; weld fast 1.5-1.8m/min, defocusing amount is 0mm, side-blown protection atmospheric pressure 0.25MPa, the long 3-5mm of anchor point, spacing 20-30mm.
Further, the two halves liner body being welded with described pressure inlet and net-filter assembly is set on the second lock base frame rank on described circumferential weld T-Ring both sides, applies certain pressure at described two halves liner body bottom portion, make described girth joint involutory; Described circumferential weld T-Ring carries out circumferential weld tack welding, regulates laser weld rifle head to guide ruddiness to aim at described circumferential weld; Described circumferential weld T-Ring carries out continuous welding and circumferential weld receives arc crater process.
Further, described second lock end step thicknesses is t/2, the wall thickness of width to be 2t, t be liner body.
Large scale spherical high-pressure gas cylinder thin-wall metal liner method for laser welding provided by the invention arranges the first lock base frame rank at pressure inlet and liner body apposition position, at liner body apposition position, circumferential weld T-Ring is set, in filter cloth edge both sides, filter screen reinforcing ring is set, pressure inlet is welded on the endoporus place of liner body by the first lock base frame rank, filter screen is welded in liner body by filter screen reinforcing ring, by circumferential weld T-Ring, liner body is welded, the arc welding difficulty solving the existence of large size, thin walled metal inner lining existing welding method is large, dimensional accuracy cannot ensure and the problem of welding quality instability.
Accompanying drawing explanation
The structural representation of the large scale spherical high-pressure gas cylinder thin-wall metal liner that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the liner body that Fig. 2 provides for the embodiment of the present invention;
The pressure inlet that Fig. 3 provides for the embodiment of the present invention welds schematic diagram with liner body;
Fig. 4 is the A portion partial enlarged drawing of Fig. 3;
The front view of the pressure inlet positioning welding that Fig. 5 provides for the embodiment of the present invention;
Fig. 6 is the top view of pressure inlet positioning welding in Fig. 5;
The welding schematic diagram of the liner body that Fig. 7 provides for the embodiment of the present invention;
The screen modules that Fig. 8 embodiment of the present invention provides welds schematic diagram with liner body.
Detailed description of the invention
See Fig. 1-2, a kind of method for laser welding of spherical high-pressure gas cylinder wall metal inner lining, described metal inner lining comprises two halves liner body 1, pressure inlet 2 and net-filter assembly 4; Described pressure inlet 2 is provided with the first lock base frame rank 2-1 with described liner body 1 apposition position, described two halves liner body 1 apposition position is provided with circumferential weld T-Ring 3, described net-filter assembly 4 comprises filter screen 4-1 and filter screen reinforcing ring 4-2, described filter screen reinforcing ring 4-2 is fixed on the inwall of described liner body 1, to wrap the edge established with described filter screen 4-1.
Described method for laser welding comprises:
Step 1, is welded on the endoporus place of described liner body 1 by described first lock base frame rank 2-1 by described pressure inlet 2.
Step 2, is welded on described filter screen 4-1 in described liner body 1 by described filter screen reinforcing ring 4-2.
Step 3, is welded described two halves liner body 1 by described circumferential weld T-Ring 3.
Introduce the structure of metal inner lining in detail.
At described pressure inlet 2, first lock base frame rank 2-1 is set with described liner body 1 apposition position.Described first lock base frame rank 2-1 thickness is t/2, width is 2t, facilitate centering and misalignment to eliminate, ensure opening endoporus 1-1 and the described pressure inlet 2 Excircle machining precision of described liner body 1, make described liner body 1 and the involutory clearance control of described pressure inlet 2 circumferential weld within 0.1mm.Arrange circumferential weld T-Ring 3 at described liner body 1 apposition position, the thickness of described circumferential weld T-Ring 3 is 3/2t, and width is 10 ~ 15t.Described net-filter assembly 4 comprises filter screen 4-1 and filter screen reinforcing ring 4-2, arranges described filter screen reinforcing ring 4-2 in described filter screen 4-1 both sides of edges.The thickness of described filter screen reinforcing ring 4-2 is t, and width is 4 ~ 5t.T is the wall degree of described liner body 1.Described liner body 1 adopts the shaping or thermoforming of sheet material deep drawn, adopts Linear cut or laser cutting to remove periphery surplus, the endoporus 1-1 of reprocessing liner body 1, machining accuracy according to
control.
See Fig. 3-6, introduce step 1 in detail.
Described pressure inlet 2 adopts machining to be shaped, and described pressure inlet 2 cylindrical and liner body 1 docking location arrange the first lock base frame rank 2-1.Described first lock base frame rank 2-1 requires to carry out back chipping process, ensures to be less than 0.1mm with the involutory post gap of described liner body 1.The assembling that pressure inlet weld clip 6 carries out described pressure inlet 2 and described liner body 1 with weld.Described pressure inlet 2 is enclosed within described pressure inlet locating shaft 6-1, described pressure inlet 2 bottom surface and described pressure inlet weld clip locating surface 6-2 sturdy.Assemble described liner body 1, make the endoporus 1-1 of described liner body be enclosed within described pressure inlet 2 flange cylindrical, and lock base frame rank 2-1 with described first and described pressure inlet weld clip locating surface 6-2 is sturdy.Described liner body 1 cylindrical holds round and centering, and rotate axis of cone 6-5 and travel forward, fagging 6-7 radially promotes by conical surface 6-6, and described liner body 1 holds round by fagging nose circle cambered surface 6-8, centering.Fixing described liner body 1, is enclosed within liner body 1 cylindrical by pressure ring 6-9, make the bore circular arc face of described pressure ring 6-9 and described liner body 1 outer wall sturdy, pressure ring 6-9 described in centering, fixes described pressure ring 6-9 with screw rod 6-10.
Described pressure inlet 1 positions weldering, regulates laser weld rifle head to make rifle head guide ruddiness center to aim at described pressure inlet 2 girth joint center.Described ruddiness center is aimed at and is not more than 0.3mm with described pressure inlet 2 girth joint centre deviation; welding parameter: laser power 1.1-1.5kW; weld fast 1.5-1.8m/min, defocusing amount is 0mm, side-blown protection atmospheric pressure 0.25MPa, the long 3-5mm of anchor point, spacing 20-30mm.
Described pressure inlet 2 carries out continuous welding.Laser weld rifle head is regulated to make rifle head guide ruddiness center to aim at pressure inlet 2 girth joint center, described ruddiness center is aimed at and is not more than 0.3mm with described pressure inlet 2 girth joint centre deviation, welding parameter: when described liner body 1 material thickness is 0.8-1.2mm, laser power is 0.9-1.3KW; When described inner lining material thickness is 1.2-1.8mm, laser power is 1.3-1.8KW; When described inner lining material 1 is thickness 1.8-2.5mm, laser power is 1.8-2.4KW, welds fast 1.0-1.2m/min, and defocusing amount is+3mm, side-blown protection atmospheric pressure 0.25MPa, continuous laser, girth joint remelting length 5 ~ 10mm.
Described pressure inlet 2 carries out circumferential weld and receives arc crater process.After circumferential weld overlap 5 ~ 10mm length of described pressure inlet 2, carry out that laser power is slow falls receipts arc, laser weld rifle head keeps former speed of welding to move on, laser power linearly decays to 0 by former bonding power, die-away time T=(2 ~ 3) W/V, wherein W is weld width, V is speed of welding, and stop after bright dipping until laser, rifle head can stop motion.
See Fig. 8, introduce step 2 in detail.
Delineate described filter screen rigging position line at described liner body 1 inwall, it is inner that described net-filter assembly 2 is positioned over described liner body 1, and described net-filter assembly 2 outer ledge is flushed with institute scribing line.
Described filter screen 4-1 is clipped in the middle by described Inner filter net reinforcing ring 4-2, then with diffusion welding (DW) or electric resistance welding firm.Described filter screen reinforcing ring 4-2 outside diameter is greater than described liner body 1 internal diameter, i.e. 0.03 ~ 0.05mm magnitude of interference.Filter screen reinforcing ring 4-2 and liner body 1 are same material.
Angle welding tack welding is carried out in the described filter screen reinforcing ring 4-2 position that to contact with liner body 1.Require that laser weld rifle head guides ruddiness center alignment angle Weld pipe mill deviation to be not more than 0.3mm; rifle head-clamp angle is 45 °; welding parameter: laser power 0.5-0.7kW; weld fast 1.5-1.8m/min, defocusing amount is 0mm, side-blown protection atmospheric pressure 0.25MPa, the long 3-5mm of anchor point, spacing 20-30mm.
Described filter screen reinforcing ring 4-2 carries out sequential welding.Require that laser weld rifle head guides ruddiness center to aim at described angle welding centre deviation and is not more than 0.3mm; rifle head-clamp angle is 45 °; welding parameter: laser power 0.9-1.1kW; weld fast 1.5-1.8m/min; defocusing amount is+3mm, side-blown protection atmospheric pressure 0.25MPa, continuous laser, girth joint remelting length 5 ~ 10mm.
See Fig. 7, introduce step 3 in detail.
After described circumferential weld T-Ring 3 can adopt sheet material to roll volume, welding, machining is shaped.Described circumferential weld T-Ring 3 both sides are processed with lock base frame rank respectively, after the grafting of described liner body 1, keep flush with outer surface, eliminate assembling misalignment, ensure part processing precision simultaneously, make the two involutory clearance control in place within 0.1mm.The liner body 1 two pieces being welded with described pressure inlet 2 and net-filter assembly 4 is set on the second lock base frame rank 3-1 on described circumferential weld T-Ring 3 both sides, applies certain pressure, make described girth joint involutory bottom described liner body 1.Described second lock base frame rank 3-1 thickness is t/2, the wall thickness of width to be 2t, t be liner body.Second lock base frame rank 3-1 requires to carry out back chipping process.
Described circumferential weld T-Ring 3 carries out circumferential weld tack welding, regulates laser weld rifle head to guide ruddiness to aim at described circumferential weld.Laser weld rifle head guides ruddiness center and circumferential weld centre deviation to be not more than 0.3mm, welding parameter: laser power 1.3-1.5kW, welds fast 1.4-1.6m/min, and defocusing amount is 0mm, side-blown protection atmospheric pressure 0.25MPa, the long 3-5mm of anchor point, spacing 20-30mm.
Described circumferential weld T-Ring 3 carries out continuous welding.Regulate laser weld rifle head to guide ruddiness to aim at described circumferential weld, laser weld rifle head guides ruddiness center and circumferential weld centre deviation to be not more than 0.3mm, and when described liner body 1 material thickness is 0.8-1.2mm, laser power is 0.9-1.3KW; When described inner lining material thickness is 1.2-1.8mm, laser power is 1.3-1.8KW; When described inner lining material 1 is thickness 1.8-2.5mm, laser power is 1.8-2.4KW, welds fast 1.0-1.2m/min, and defocusing amount is+3mm, side-blown protection atmospheric pressure 0.25MPa, continuous laser, girth joint remelting length 5 ~ 10mm.
Described circumferential weld T-Ring 3 carries out circumferential weld and receives arc crater process.After circumferential weld overlap 5 ~ 10mm length of described circumferential weld T-Ring 3, adopt laser power to delay and fall receipts arc, at this moment laser weld rifle head keeps former speed of welding to move on, laser power linearly decays to 0 by former bonding power, die-away time T=(2 ~ 3) W/V, wherein W is weld width, V is speed of welding.Stop after bright dipping until laser, rifle head can stop motion.
Introduce embodiments of the invention in order to clearer, introduced from the using method of the embodiment of the present invention below.
At pressure inlet 2 and described liner body 1 apposition position, the first lock base frame rank 2-1 is set, first lock base frame rank 2-1 thickness is t/2, width is 2t, centering and misalignment is facilitated to eliminate, ensure opening endoporus 1-1 and the pressure inlet 2 Excircle machining precision of liner body 1, make liner body 1 and the involutory clearance control of pressure inlet 2 circumferential weld within 0.1mm.Arrange circumferential weld T-Ring 3 at liner body 1 apposition position, the thickness of circumferential weld T-Ring 3 is 3/2t, and width is 10 ~ 15t.Net-filter assembly 4 comprises filter screen 4-1 and filter screen reinforcing ring 4-2, arranges filter screen reinforcing ring 4-2 in filter screen 4-1 both sides of edges, and the thickness of filter screen reinforcing ring 4-2 is t, and width is 4 ~ 5t.T is the wall degree of described liner body 1.Liner body 1 adopts the shaping or thermoforming of sheet material deep drawn, adopts Linear cut or laser cutting to remove periphery surplus, the endoporus 1-1 of reprocessing liner body 1, machining accuracy according to
control.Pressure inlet 2 adopts machining to be shaped, and pressure inlet 2 cylindrical and liner body 1 docking location arrange the first lock base frame rank 2-1.First lock base frame rank 2-1 requires to carry out back chipping process, ensures to be less than 0.1mm with the involutory post gap of liner body 1.The assembling that pressure inlet weld clip 6 carries out pressure inlet 2 and liner body 1 with weld.Pressure inlet 2 is enclosed within pressure inlet locating shaft 6-1, pressure inlet 2 bottom surface and pressure inlet weld clip locating surface 6-2 sturdy.Assembling liner body 1, makes the endoporus 1-1 of liner body be enclosed within pressure inlet 2 flange cylindrical, and locks base frame rank 2-1 with first and described pressure inlet weld clip locating surface 6-2 is sturdy.Liner body 1 cylindrical holds round and centering, and rotate axis of cone 6-5 and travel forward, fagging 6-7 radially promotes by conical surface 6-6, and described liner body 1 holds round by fagging nose circle cambered surface 6-8, centering.Secure liner body 1, is enclosed within liner body 1 cylindrical by pressure ring 6-9, make the bore circular arc face of pressure ring 6-9 and liner body 1 outer wall sturdy, centering pressure ring 6-9, fixes pressure ring 6-9 with screw rod 6-10.Pressure inlet 1 positions weldering, regulates laser weld rifle head to make rifle head guide ruddiness center to aim at described pressure inlet 2 girth joint center.Described ruddiness center is aimed at and is not more than 0.3mm with described pressure inlet 2 girth joint centre deviation; welding parameter: laser power 1.1-1.5kW; weld fast 1.5-1.8m/min, defocusing amount is 0mm, side-blown protection atmospheric pressure 0.25MPa, the long 3-5mm of anchor point, spacing 20-30mm.Pressure inlet 2 carries out continuous welding.Laser weld rifle head is regulated to make rifle head guide ruddiness center to aim at pressure inlet 2 girth joint center, ruddiness center is aimed at and is not more than 0.3mm with described pressure inlet 2 girth joint centre deviation, welding parameter: when described liner body 1 material thickness is 0.8-1.2mm, laser power is 0.9-1.3KW; When described inner lining material thickness is 1.2-1.8mm, laser power is 1.3-1.8KW; When described inner lining material 1 is thickness 1.8-2.5mm, laser power is 1.8-2.4KW, welds fast 1.0-1.2m/min, and defocusing amount is+3mm, side-blown protection atmospheric pressure 0.25MPa, continuous laser, girth joint remelting length 5 ~ 10mm.Pressure inlet 2 carries out circumferential weld and receives arc crater process.After circumferential weld overlap 5 ~ 10mm length of pressure inlet 2, carry out that laser power is slow falls receipts arc, laser weld rifle head keeps former speed of welding to move on, laser power linearly decays to 0 by former bonding power, die-away time T=(2 ~ 3) W/V, wherein W is weld width, V is speed of welding, and stop after bright dipping until laser, rifle head can stop motion.
Delineate described filter screen rigging position line at liner body 1 inwall, it is inner that net-filter assembly 2 is positioned over liner body 1, and net-filter assembly 2 outer ledge is flushed with institute scribing line.Filter screen 4-1 is clipped in the middle by Inner filter net reinforcing ring 4-2, then with diffusion welding (DW) or electric resistance welding firm.Filter screen reinforcing ring 4-2 outside diameter is greater than liner body 1 internal diameter, i.e. 0.03 ~ 0.05mm magnitude of interference.Filter screen reinforcing ring 4-2 and liner body 1 are same material.Angle welding tack welding is carried out in the filter screen reinforcing ring 4-2 position that to contact with liner body 1.Require that laser weld rifle head guides ruddiness center alignment angle Weld pipe mill deviation to be not more than 0.3mm; rifle head-clamp angle is 45 °; welding parameter: laser power 0.5-0.7kW; weld fast 1.5-1.8m/min, defocusing amount is 0mm, side-blown protection atmospheric pressure 0.25MPa, the long 3-5mm of anchor point, spacing 20-30mm.Filter screen reinforcing ring 4-2 carries out sequential welding.Require that laser weld rifle head guides ruddiness center to aim at described angle welding centre deviation and is not more than 0.3mm; rifle head-clamp angle is 45 °; welding parameter: laser power 0.9-1.1kW; weld fast 1.5-1.8m/min; defocusing amount is+3mm, side-blown protection atmospheric pressure 0.25MPa, continuous laser, girth joint remelting length 5 ~ 10mm.
After circumferential weld T-Ring 3 can adopt sheet material to roll volume, welding, machining is shaped.Circumferential weld T-Ring 3 both sides are processed with lock base frame rank respectively, after liner body 1 grafting, keep flush with outer surface, eliminate assembling misalignment, ensure part processing precision simultaneously, make the two involutory clearance control in place within 0.1mm.The liner body 1 two pieces being welded with pressure inlet 2 and net-filter assembly 4 is set on the second lock base frame rank 3-1 on described circumferential weld T-Ring 3 both sides, applies certain pressure, make girth joint involutory bottom liner body 1.Second lock base frame rank 3-1 thickness is t/2, the wall thickness of width to be 2t, t be liner body 1.Second lock base frame rank 3-1 requires to carry out back chipping process.Circumferential weld T-Ring 3 carries out circumferential weld tack welding, regulates laser weld rifle head to guide ruddiness to aim at described circumferential weld.Laser weld rifle head guides ruddiness center and circumferential weld centre deviation to be not more than 0.3mm; welding parameter: laser power 1.3-1.5kW; weld fast 1.4-1.6m/min, defocusing amount is 0mm, side-blown protection atmospheric pressure 0.25MPa, the long 3-5mm of anchor point, spacing 20-30mm.Circumferential weld T-Ring 3 carries out continuous welding.Regulate laser weld rifle head to guide ruddiness to aim at described circumferential weld, laser weld rifle head guides ruddiness center and circumferential weld centre deviation to be not more than 0.3mm, and when described liner body 1 material thickness is 0.8-1.2mm, laser power is 0.9-1.3KW; When described inner lining material thickness is 1.2-1.8mm, laser power is 1.3-1.8KW; When described inner lining material 1 is thickness 1.8-2.5mm, laser power is 1.8-2.4KW, welds fast 1.0-1.2m/min, and defocusing amount is+3mm, side-blown protection atmospheric pressure 0.25MPa, continuous laser, girth joint remelting length 5 ~ 10mm.Circumferential weld T-Ring 3 carries out circumferential weld and receives arc crater process.After circumferential weld overlap 5 ~ 10mm length of described circumferential weld T-Ring 3, adopt laser power to delay and fall receipts arc, at this moment laser weld rifle head keeps former speed of welding to move on, laser power linearly decays to 0 by former bonding power, die-away time T=(2 ~ 3) W/V, wherein W is weld width, V is speed of welding.Stop after bright dipping until laser, rifle head can stop motion.
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. a method for laser welding for spherical high-pressure gas cylinder wall metal inner lining, is characterized in that, described metal inner lining comprises two halves liner body (1), pressure inlet (2) and net-filter assembly (4); Described pressure inlet (2) and described liner body (1) apposition position are provided with the first lock base frame rank (2-1), described two halves liner body (1) apposition position is provided with circumferential weld T-Ring (3), described net-filter assembly (4) comprises filter screen (4-1) and filter screen reinforcing ring (4-2), described filter screen reinforcing ring (4-2) is fixed on the inwall of described liner body (1), to wrap the edge established with described filter screen (4-1);
Described method for laser welding comprises:
Described pressure inlet (2) is welded on the endoporus place of described liner body (1) by described first lock base frame rank (2-1);
Described filter screen (4-1) is welded in described liner body (1) by described filter screen reinforcing ring (4-2);
By described circumferential weld T-Ring (3), described two halves liner body (1) is welded.
2. welding method according to claim 1, is characterized in that:
Described first lock base frame rank (2-1) thickness is t/2, and width is 2t; The thickness of described circumferential weld T-Ring (3) is 3/2t, and width is 10 ~ 15t; The thickness of described filter screen reinforcing ring (4-2) is t, and width is 4 ~ 5t; T is the wall degree of described liner body (1).
3. welding method according to claim 1, is characterized in that:
The assembling that pressure inlet weld clip (6) carries out described pressure inlet (2) and described liner body (1) with weld;
Described pressure inlet (2) positions weldering, regulates laser weld rifle head to make rifle head guiding ruddiness center aim at the girth joint center that first on described pressure inlet (2) locks base frame rank (2-1) and described liner body (1) apposition position;
Described pressure inlet (2) carries out continuous welding and circumferential weld receives arc crater process.
4. welding method according to claim 3, is characterized in that:
Described pressure inlet (2) is enclosed within described pressure inlet locating shaft (6-1), described pressure inlet (2) bottom surface and described pressure inlet weld clip locating surface (6-2) sturdy;
Assemble described liner body (1), make the endoporus (1-1) of described liner body be enclosed within described pressure inlet (2) flange cylindrical, and lock base frame rank (2-1) with described first and described pressure inlet weld clip locating surface (6-2) is sturdy;
Described liner body (1) cylindrical holds round and centering, rotate the axis of cone (6-5) to travel forward, fagging (6-7) radially promotes by the conical surface (6-6), and described liner body (1) holds round by fagging nose circle cambered surface (6-8), centering;
Fixing described liner body (1), pressure ring (6-9) is enclosed within liner body (1) cylindrical, make the bore circular arc face of described pressure ring (6-9) and described liner body (1) outer wall sturdy, pressure ring described in centering (6-9), fixes described pressure ring (6-9) with screw rod (6-10).
5. welding method according to claim 3, is characterized in that:
After circumferential weld overlap 5 ~ 10mm length of described pressure inlet (2), carry out that laser power is slow falls receipts arc, laser weld rifle head keeps former speed of welding to move on, laser power linearly decays to 0 by former bonding power, die-away time T=(2 ~ 3) W/V, wherein W is weld width, V is speed of welding, and stop after bright dipping until laser, rifle head can stop motion.
6. welding method according to claim 1, is characterized in that:
Described filter screen rigging position line is delineated at described liner body (1) inwall, it is inner that described net-filter assembly (2) is positioned over described liner body (1), and described net-filter assembly (2) outer ledge is flushed with institute scribing line;
Described filter screen (4-1) is clipped in the middle by described Inner filter net reinforcing ring (4-2), firm welding;
Angle welding tack welding is carried out in described filter screen reinforcing ring (4-2) position that to contact with liner body (1);
Described filter screen reinforcing ring (4-2) carries out sequential welding.
7. welding method according to claim 6, is characterized in that:
Described filter screen reinforcing ring (4-2) outside diameter is greater than described liner body (1) internal diameter.
8. welding method according to claim 6, is characterized in that, described filter screen reinforcing ring (4-2) position that contacts with liner body (1) is carried out angle welding tack welding and comprised:
Described laser weld rifle head guides ruddiness center alignment angle Weld pipe mill deviation to be not more than 0.3mm; rifle head-clamp angle is 45 °; welding parameter: laser power 0.5-0.7kW; weld fast 1.5-1.8m/min, defocusing amount is 0mm, side-blown protection atmospheric pressure 0.25MPa, the long 3-5mm of anchor point, spacing 20-30mm.
9. welding method according to claim 1, is characterized in that:
The two halves liner body (1) being welded with described pressure inlet (2) and net-filter assembly (4) is set on second lock base frame rank (3-1) on described circumferential weld T-Ring (3) both sides, apply certain pressure in described two halves liner body (1) bottom, make described girth joint involutory;
Described circumferential weld T-Ring (3) carries out circumferential weld tack welding, regulates laser weld rifle head to guide ruddiness to aim at described circumferential weld;
Described circumferential weld T-Ring (3) carries out continuous welding and circumferential weld receives arc crater process.
10. welding method according to claim 9, is characterized in that:
Described second lock base frame rank (3-1) thickness is t/2, the wall thickness of width to be 2t, t be liner body.
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| CN109454330A (en) * | 2018-11-30 | 2019-03-12 | 上海航天精密机械研究所 | Circumferential weld locks bottom connector and its manufacture welding method |
| CN113020771A (en) * | 2021-03-23 | 2021-06-25 | 中国兵器科学研究院宁波分院 | Welding device and welding method for welding circular lap joint on lap joint |
| CN116748683A (en) * | 2023-08-23 | 2023-09-15 | 布柯玛蓄能器张家口有限公司 | Laser welding production process of diaphragm type energy accumulator shell |
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