CN106216959B - The manufacture method of automobile frame welded still pipe - Google Patents
The manufacture method of automobile frame welded still pipe Download PDFInfo
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- CN106216959B CN106216959B CN201610686423.2A CN201610686423A CN106216959B CN 106216959 B CN106216959 B CN 106216959B CN 201610686423 A CN201610686423 A CN 201610686423A CN 106216959 B CN106216959 B CN 106216959B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines
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Abstract
The present invention relates to a kind of manufacture method of automobile frame welded still pipe, belong to metal material processing technical field.A kind of manufacture method of automobile frame welded still pipe, it is characterised in that including the step such as strip cutting, pickling processes, cold rolling, roll bending formation and welding, the processing of weld seam sublimate, phosphatization, saponification process and cold drawing treatment.Automobile frame welded still pipe intensity height, the good toughness of manufacture method processing of the present invention, weld strength is high, and higher obdurability can be still kept after larger plastic deformation is born.Flattening test reaches 90 degree and 0 degree of flat flawless of total head after steel pipe welding；Flaring test, enlarging rate >=30%, weld seam and mother metal are without cracking；The satisfactory wall thickness deviation of commissure effective thickness.
Description
Technical field
The present invention relates to a kind of manufacture method of automobile frame welded still pipe, belong to metal material processing technical field.
Background technology
Since reform and opening-up, Chinese Auto Industry development is swift and violent, into after the new century, either yield and sales volume, more
It is that explosive growth is presented, after particularly breaking through 18,000,000 to production and marketing in 2010, China has become the vapour of global maximum
Car production and consumption state, the automobile market in China is considered as future development market with the largest potentiality.Automobile industry turns into its people
Economic important pillar industry, form than more complete industrial system, also turned into and embody the significant of national competitiveness
Industry.
Most domestic car enterprise is continuously improving the localization rate of parts and components of auto-parts, is improving the competition of oneself always at present
Power.Although the level of most domestic auto parts and components supplier, it can not still supply the key zero of the high automobile such as benz, BMW
Part and the engine and gearbox for obscuring energy technology, but generally skill level greatly improves, and one not
Holding the trend ignored is, key parts technical ability has progressively shifted to China with market, and at the same time, Chinese automobile parts are
Start to enter into international market on a large scale, and the merger for enthusiastically participating in international automobile fitting industry is integrated.
Now, the production domesticization of auto-parts has begun to crucial spare and accessory parts develop since common spare and accessory parts, from low
End vehicle starts to develop to high-end vehicle.Think to most people in the industry all tendentiousness, as domestic automobile producer adds one after another
The big production domesticization dynamics of local production, drops many times plus domestic automobile price, and to keep profit margin, China of changing the line of production goes forward side by side one
It is clearly the shortcut that can not be detoured that step, which improves the localization rate of parts and components,.
Automobile using steel pipe is an important component of auto-parts, with the continuous development of automobile industry, new skill
The gradual maturation of the constantly improve of art new technology, particularly automobile frame field hydraulic forming technology, the plate of a large amount of scripts
Material punch welding part is changed to the steel pipe shaped by fluid pressure part used at present.But due to supporting, high-quality by equipment capability, technology
The factors such as raw material resources supply restrict, and the production of automobile using Precision Welded Pipe has substantially lagged behind the manufacturing hair of auto parts and components
Exhibition, it is difficult to meet that the production domesticization of medium-to-high grade passenger car is provided together and require.Therefore, it is necessary to based on current steady quality, increasing
While adding yield, the medium- and long-term strategy for being conceived to the production domesticization development of automobile using precision tube is established.
Hydraulic forming technology, because dimensional accuracy is high, complex component shaping is simple, mechanical property is good, and material consumption is few
Advantage, there is increasing vehicle frame product to use the technology, also therefore the application of automobile using precision tube is more and more wider, bag
Include the increasing chassis type such as B posts, D posts, torsion beam, engine support and use hydraulic processes.To comply with the market demand, I
The automobile frame D post welded tube products of the vehicles such as SUV, MPV are developed together with species abundance in Baosteel in Shanghai, Anhui University of Technology, to substitute
Import, promote the localization process of Automobile Parts Industry.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of automobile frame welded still pipe
Manufacture method, using the vehicle frame of this method processing with welded still pipe intensity is high, good toughness, weld strength is high, bear it is larger
Higher obdurability can be still kept after plastic deformation.
According to technical scheme provided by the invention：The manufacture method of automobile frame welded still pipe, it is characterised in that including
Following steps：
1）, strip cut：By the wide coil of strip of outsourcing, slitting is into strip on slitter, according to vehicle frame welded still pipe product
Required diameter determines the width of strip；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, strip is first sent into cold rinse bank after overpickling and uses high pressure water washing, is then re-fed into hot water storgae
Scald, dried again after going out hot water storgae；
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip is equal to vehicle frame welding steel after cold rolling
Thickness needed for pipe product subtracts 0.02 ~ 0.05mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into progress roll bending in continuous pressure roller forming machine to process into circle,
Cheng Yuanhou strip is welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 80 ~ 110KW, and speed of welding is
15 ~ 20m/min, amount of compression are 1.0 ~ 1.5mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason, the ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, welded pipe end diameter is reached required size；
7）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 1 ~ 3 is carried out according to different technological requirements
It is secondary, to obtain required size.
As a further improvement on the present invention, the step 1）In coil of strip material for Ultra-low carbon and deep drawing quality can
TRIP steel.
As a further improvement on the present invention, the step 2）In, the concentration of hydrochloric acid is 120 ~ 160g/L in descaling bath；It is cold
Flushing temperature in tank is 10 ~ 30 DEG C, and flushing pressure is 8 ~ 10kg/cm2；Temperature is scalded as 90 ~ 100 DEG C in hot water storgae；
Strip is 30 ~ 40m/ minutes by the speed of descaling bath, the speed of cold rinse bank and hot water storgae and drying, and drying temperature is 100 ~
120℃。
As a further improvement on the present invention, the step 6）In phosphating solution be volumetric concentration be 10 ~ 11% zinc calcium phosphorus
Change liquid, the temperature of phosphating solution is 65 ~ 75 DEG C, and dip time of the ERW in phosphating solution is 25 ~ 30 minutes.
As a further improvement on the present invention, the step 6）In saponification liquor composition include lubricant, water and soap powder, its
In, the mass ratio of lubricant and water is 1：（18~20）, soap powder dosage is 50 ~ 60KG/ ton saponification liquors, and saponification liquor temperature is 65 ~ 75
DEG C, dip time of the ERW in saponification liquor is 10 ~ 25 minutes.
As a further improvement on the present invention, the manufacture method also includes surface treatment step, and surface treatment step exists
After cold drawing treatment step, the concrete operations of surface treatment step are：Rust remover spraying is covered in the surface of ERW, so
The surface of ERW is blown with high temperature compressed air afterwards, while rust remover is blown away, high temperature compressed air will
The rust remover drying of ERW surface residual, one layer of rust remover diaphragm is formed on the surface of welded tube.
The present invention compared with prior art, has the following advantages that：The vehicle frame welded still pipe of manufacture method processing of the present invention
Intensity is high, good toughness, and weld strength is high, and higher obdurability can be still kept after larger plastic deformation is born.
Embodiment
With reference to specific embodiment, the invention will be further described.
Embodiment 1
The automobile frame welded still pipe of Φ 60 × 1.5mm specifications is manufactured, is comprised the following steps：
1）, strip cut：Diameter according to needed for vehicle frame with welded still pipe product, by thickness 1.5mm × width of outsourcing
The 1280mm coil of strip strip of slitting into width for 188mm on slitter；The material of the strip is Ultra-low carbon and high extension
The TRIP steel of performance, its yield strength are 140-240MPa, and tensile strength is >=270MPa, and elongation percentage is >=34%；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, the concentration of hydrochloric acid is 120g/L；Strip is first sent into cold rinse bank after overpickling and uses high pressure water flushing
Wash, the flushing temperature in cold rinse bank is 10 DEG C, flushing pressure 10kg/cm2；Then it is re-fed into hot water storgae to scald, scalds temperature
For 100 DEG C, dried again after going out hot water storgae, drying temperature is 100 DEG C；Strip in hot water storgae passes through descaling bath, cold rinse bank and heat
The speed of tank and the speed of drying are 30m/ minutes,
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip is equal to vehicle frame welding steel after cold rolling
Thickness needed for pipe product subtracts 0.02mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into progress roll bending in continuous pressure roller forming machine to process into circle,
Cheng Yuanhou strip is welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 80KW, speed of welding 15m/
Min, amount of compression 1.0mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason；Phosphating solution in phosphating pond is the zinc calcium phosphorization liquid that volumetric concentration is 10%, and the temperature of phosphating solution is 75 DEG C, and ERW exists
Dip time in phosphating solution is 25 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubrication
The mass ratio of agent and water is 1：18, soap powder dosage is 50KG/ ton saponification liquors, and saponification liquor temperature is 75 DEG C, and ERW is in saponification
Dip time in liquid is 10 minutes；ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, makes welded pipe end straight
Footpath reaches required size；
7）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 2 times is carried out according to technological requirement, with
To required size；
8）, surface treatment：Rust remover spraying is covered in the surface of ERW, then with high temperature compressed air to vertical masonry joint
The surface of welded tube is blown, and while rust remover is blown away, high temperature compressed air is by the derusting of ERW surface residual
Agent is dried, and one layer of rust remover diaphragm is formed on the surface of welded tube.
9）, verification test：Flattening test reaches 90 degree and 0 degree of flat flawless of total head after steel pipe welding prepared by embodiment 1；Expand
Oral examination is tested, and enlarging rate >=30%, weld seam and mother metal are without cracking；The satisfactory wall thickness deviation of commissure effective thickness.
Embodiment 2
The automobile frame welded still pipe of Φ 60 × 1.5mm specifications is manufactured, is comprised the following steps：
1）, strip cut：Diameter according to needed for vehicle frame with welded still pipe product, by thickness 1.5mm × width of outsourcing
The 1280mm coil of strip strip of slitting into width for 188mm on slitter；The material of the strip is Ultra-low carbon and high extension
The TRIP steel of performance, its yield strength are 140-240MPa, and tensile strength is >=270MPa, and elongation percentage is >=34%；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, the concentration of hydrochloric acid is 140g/L；Strip is first sent into cold rinse bank after overpickling and uses high pressure water flushing
Wash, the flushing temperature in cold rinse bank is 20 DEG C, flushing pressure 9kg/cm2；Then it is re-fed into hot water storgae to scald, scalding temperature is
95 DEG C, dried again after going out hot water storgae, drying temperature is 110 DEG C；Strip in hot water storgae passes through descaling bath, cold rinse bank and hot water storgae
Speed and drying speed be 35m/ minutes,
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip is equal to vehicle frame welding steel after cold rolling
Thickness needed for pipe product subtracts 0.03mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into progress roll bending in continuous pressure roller forming machine to process into circle,
Cheng Yuanhou strip is welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 95KW, speed of welding 18m/
Min, amount of compression 1.2mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason；Phosphating solution in phosphating pond is the zinc calcium phosphorization liquid that volumetric concentration is 11%, and the temperature of phosphating solution is 70 DEG C, and ERW exists
Dip time in phosphating solution is 28 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubrication
The mass ratio of agent and water is 1：19, soap powder dosage is 55KG/ ton saponification liquors, and saponification liquor temperature is 70 DEG C, and ERW is in saponification
Dip time in liquid is 20 minutes；ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, makes welded pipe end straight
Footpath reaches required size；
7）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 2 times is carried out according to technological requirement, with
To required size；
8）, surface treatment：Rust remover spraying is covered in the surface of ERW, then with high temperature compressed air to vertical masonry joint
The surface of welded tube is blown, and while rust remover is blown away, high temperature compressed air is by the derusting of ERW surface residual
Agent is dried, and one layer of rust remover diaphragm is formed on the surface of welded tube.
9）, verification test：Flattening test reaches 90 degree and 0 degree of flat flawless of total head after steel pipe welding prepared by embodiment 2；Expand
Oral examination is tested, and enlarging rate >=30%, weld seam and mother metal are without cracking；The satisfactory wall thickness deviation of commissure effective thickness.
Embodiment 3
The automobile frame welded still pipe of Φ 60 × 1.5mm specifications is manufactured, is comprised the following steps：
1）, strip cut：Diameter according to needed for vehicle frame with welded still pipe product, by thickness 1.5mm × width of outsourcing
The 1280mm coil of strip strip of slitting into width for 188mm on slitter；The material of the strip is Ultra-low carbon and high extension
The TRIP steel of performance, its yield strength are 140-240MPa, and tensile strength is >=270MPa, and elongation percentage is >=34%；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, the concentration of hydrochloric acid is 160g/L；Strip is first sent into cold rinse bank after overpickling and uses high pressure water flushing
Wash, the flushing temperature in cold rinse bank is 30 DEG C, flushing pressure 8kg/cm2；Then it is re-fed into hot water storgae to scald, scalding temperature is
90 DEG C, dried again after going out hot water storgae, drying temperature is 120 DEG C；Strip in hot water storgae passes through descaling bath, cold rinse bank and hot water storgae
Speed and drying speed be 40m/ minutes,
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip is equal to vehicle frame welding steel after cold rolling
Thickness needed for pipe product subtracts 0.05mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into progress roll bending in continuous pressure roller forming machine to process into circle,
Cheng Yuanhou strip is welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 110KW, and speed of welding is
20m/min, amount of compression 1.5mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason；Phosphating solution in phosphating pond is the zinc calcium phosphorization liquid that volumetric concentration is 11%, and the temperature of phosphating solution is 65 DEG C, and ERW exists
Dip time in phosphating solution is 30 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubrication
The mass ratio of agent and water is 1：20, soap powder dosage is 60KG/ ton saponification liquors, and saponification liquor temperature is 65 DEG C, and ERW is in saponification
Dip time in liquid is 25 minutes；ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, makes welded pipe end straight
Footpath reaches required size；
7）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 2 times is carried out according to technological requirement, with
To required size；
8）, surface treatment：Rust remover spraying is covered in the surface of ERW, then with high temperature compressed air to vertical masonry joint
The surface of welded tube is blown, and while rust remover is blown away, high temperature compressed air is by the derusting of ERW surface residual
Agent is dried, and one layer of rust remover diaphragm is formed on the surface of welded tube.
9）, verification test：Flattening test reaches 90 degree and 0 degree of flat flawless of total head after steel pipe welding prepared by embodiment 3；Expand
Oral examination is tested, and enlarging rate >=30%, weld seam and mother metal are without cracking；The satisfactory wall thickness deviation of commissure effective thickness.
Zinc calcium phosphorization liquid used in the present invention can use commercially available conventional Zinc-calcium series phosphatating liquid, in the various embodiments described above
Employed in for Jiangyin brocade it is grand chemical treatment Co., Ltd production zinc calcium phosphorization liquid.
Lubricant used in saponification liquor of the present invention can use commercially available conventional lubricant, in the various embodiments described above
The used lubricant for the production of the factory of Shanghai chemical industry seven.
Claims (6)
1. the manufacture method of automobile frame welded still pipe, it is characterised in that comprise the following steps：
1）, strip cut：By the wide coil of strip of outsourcing, slitting is into strip on slitter, according to vehicle frame needed for welded still pipe product
Diameter determine the width of strip；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, in descaling bath
Pickle uses hydrochloric acid, and strip is first sent into cold rinse bank after overpickling and uses high pressure water washing, is then re-fed into hot water storgae and scalds,
Dried again after going out hot water storgae；
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip is produced equal to vehicle frame with welded still pipe after cold rolling
Thickness needed for product subtracts 0.02 ~ 0.05mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into continuous pressure roller forming machine and carries out roll bending into circle processing, Cheng Yuan
Strip afterwards is welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 80 ~ 110KW, speed of welding is 15 ~
20m/min, amount of compression are 1.0 ~ 1.5mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially in distance
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be carried for welding process
Supplied gas is protected, and reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile in vertical masonry joint
When welded tube not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including remove welded tube outer surface outer burr and
Burr inside welded tube；
6）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, carries out phosphatization, saponification process, phosphorus
Change, carry out dog in the ERW feeding head rolling machine after saponification, welded pipe end diameter is reached required size；
7）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the termination after pinching processing, together
When mandrel is inserted in welded tube, then make welded tube pass through with tapered minimum-value aperture be less than welded tube external diameter die hole, make welded tube
Inside and outside caliber uniform shrinkage is deformed, and is extended on welded tube length direction, and cold-drawn 1 ~ 3 time is carried out according to different technological requirements,
To obtain required size.
2. the manufacture method of automobile frame welded still pipe as claimed in claim 1, it is characterised in that：The step 1）In
Coil of strip material is the TRIP steel of Ultra-low carbon and deep drawing quality energy.
3. the manufacture method of automobile frame welded still pipe as claimed in claim 1, it is characterised in that：The step 2）In,
The concentration of hydrochloric acid is 120 ~ 160g/L in descaling bath；Flushing temperature in cold rinse bank is 10 ~ 30 DEG C, and flushing pressure is 8 ~ 10kg/
cm2；Temperature is scalded as 90 ~ 100 DEG C in hot water storgae；Strip is by descaling bath, the speed of cold rinse bank and hot water storgae and drying
Speed is 30 ~ 40m/ minutes, and drying temperature is 100 ~ 120 DEG C.
4. the manufacture method of automobile frame welded still pipe as claimed in claim 1, it is characterised in that：The step 6）In
Phosphating solution is the zinc calcium phosphorization liquid that volumetric concentration is 10 ~ 11%, and the temperature of phosphating solution is 65 ~ 75 DEG C, and ERW is in phosphating solution
Dip time be 25 ~ 30 minutes.
5. the manufacture method of automobile frame welded still pipe as claimed in claim 1, it is characterised in that：The step 6）In
Saponification liquor composition includes lubricant, water and soap powder, wherein, the mass ratio of lubricant and water is 1：（18~20）, soap powder dosage is 50
~ 60KG/ ton saponification liquors, saponification liquor temperature are 65 ~ 75 DEG C, and dip time of the ERW in saponification liquor is 10 ~ 25 minutes.
6. the manufacture method of automobile frame welded still pipe as claimed in claim 1, it is characterised in that：The manufacture method is also
Including surface treatment step, after cold drawing treatment step, the concrete operations of surface treatment step are surface treatment step：It will remove
Rust agent spraying is covered in the surface of ERW, and then the surface of ERW is blown with high temperature compressed air, is inciting somebody to action
While rust remover is blown away, high temperature compressed air dries the rust remover of ERW surface residual, is formed on the surface of welded tube
One layer of rust remover diaphragm.
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| CN201610686423.2A CN106216959B (en) | 2016-08-18 | 2016-08-18 | The manufacture method of automobile frame welded still pipe |
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| CN201610686423.2A CN106216959B (en) | 2016-08-18 | 2016-08-18 | The manufacture method of automobile frame welded still pipe |
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| CN106216959B true CN106216959B (en) | 2018-03-30 |
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| CN109483178A (en) * | 2018-12-29 | 2019-03-19 | 无锡苏嘉法斯特汽车零配件有限公司 | A kind of welding method of zinc-plated high-strength vehicle frame welded tube |
| CN110076568B (en) * | 2019-05-31 | 2024-05-31 | 张家港华程机车精密制管有限公司 | Production device for welded steel pipe of web arm of crawler crane |
| CN111001994A (en) * | 2019-12-28 | 2020-04-14 | 浙江华美欧汽车零部件制造有限公司 | Integrated forming process of steel pipe fitting bracket for automobile |
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| CN87104077A (en) * | 1987-06-03 | 1988-12-14 | 李振明 | Cold-drawing technology of high-frequency welded thin-wall steel pipe |
| EP1001856A1 (en) * | 1997-08-06 | 2000-05-24 | SMS Demag AG | METHOD FOR PRODUCING WELDED Cu AND Cu ALLOY PIPES |
| CN101130197A (en) * | 2006-09-26 | 2008-02-27 | 李永立 | Cold drawing and cold rolling production method of high-precision seamless steel tube |
| CN102764958A (en) * | 2012-07-13 | 2012-11-07 | 江苏中友精密制管有限公司 | Process for manufacturing cold-rolled/cold-drawn precise welded steel pipe |
| CN103591118A (en) * | 2013-11-19 | 2014-02-19 | 无锡苏嘉法斯特汽车零配件有限公司 | Manufacturing technology of transmission shaft tube |
| CN103894798A (en) * | 2014-03-31 | 2014-07-02 | 张家港保税区亚信汽车零部件科技有限公司 | Manufacturing method of precisely-welded pipe |
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2016
- 2016-08-18 CN CN201610686423.2A patent/CN106216959B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104077A (en) * | 1987-06-03 | 1988-12-14 | 李振明 | Cold-drawing technology of high-frequency welded thin-wall steel pipe |
| EP1001856A1 (en) * | 1997-08-06 | 2000-05-24 | SMS Demag AG | METHOD FOR PRODUCING WELDED Cu AND Cu ALLOY PIPES |
| CN101130197A (en) * | 2006-09-26 | 2008-02-27 | 李永立 | Cold drawing and cold rolling production method of high-precision seamless steel tube |
| CN102764958A (en) * | 2012-07-13 | 2012-11-07 | 江苏中友精密制管有限公司 | Process for manufacturing cold-rolled/cold-drawn precise welded steel pipe |
| CN103591118A (en) * | 2013-11-19 | 2014-02-19 | 无锡苏嘉法斯特汽车零配件有限公司 | Manufacturing technology of transmission shaft tube |
| CN103894798A (en) * | 2014-03-31 | 2014-07-02 | 张家港保税区亚信汽车零部件科技有限公司 | Manufacturing method of precisely-welded pipe |
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